Locations
Dermatology & Aesthetics of Wicker Park
Chicago, IL
Phone
Practice website
Insurances accepted
Blue Cross Blue Shield of Illinois
Aetna Life Insurance Company
Medicare
Cigna
BlueCross BlueShield
About
Bio
Peter A. Lio, MD is a Clinical Assistant Professor of Dermatology at the Feinberg School of Medicine of Northwestern University. His clinical practice focuses on adult and pediatric general dermatology. He has spoken nationally and internationally about eczema and atopic dermatitis, as well as alternative medicine. He continues to be active in research and patient care.
SpecialtiesDoctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Dermatology
Languages spoken
English
Doctor Q&A
95 Answers
7 Agrees
The number of answers this doctor has agreed with.
A 18-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possible cyst: These are always difficult, even when seen in person. Cysts, lipoma (little fatty growths) and rheumatoid nodules can all cause similar little lumps ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 31-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Need more info: Eczema, a cold sore, or a bacterial infection like impetigo can develop around the mouth in children. Sometimes an irritant contact dermatitis can pr... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 21-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Yes, but...: Yes, but there are lots of other things this could be! everything from a urinary tract infection to a more serious problem can cause symptoms as you ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Melanonychia: Melanonychia is a brown-to-black line within the nail, frequently seen in patients with darker skin and often on multiple nails. It can be seen in ce... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Benzoyl Peroxide: In addition to eating a healthy diet, with little or no sugary foods, no dairy and lots of vegetables, benzoyl peroxide is probably the best otc produ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 34-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Hyperhidrosis: Increased sweating or hyperhidrosis is very common. If it is only happening in certain areas (like your armpits or hands), there are powerful prescrip... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 23-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Need more info: Some patients are very oily and, especially in the teens to early twenties, can have tremendous oil production. Are you having scaling or itching as ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 19-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Probably twice.: Many folks are allergic to--or at least sensitive to--fabric softeners. My sense is a couple of washes (maybe double rinse each one) in a very mild d... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 27-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Folliculitis?: Infection of the hair follicles commonly occurs on the neck and back and is usually caused by staph bacteria. In this case, usually oral antibiotics ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 42-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Pretty sure no: I'm not associated with the military so perhaps things have changed, but I do not think this could be required. Shaving the body hair can cause all s... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Biotin: Taking extra biotin, a safe vitamin supplement, has been shown to make nails thicker and stronger. Many patients report that their nails grow faster ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Need another opinion: In general, if you have a problem and your doctor has not been able to help, it is appropriate to get a second opinion. In this case, there are many d... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 30-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Benadryl (diphenhydramine): Hives are very common and can be triggered by a medication, a viral infection, or sometimes without a clear cause. These are likely related to her vi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 19-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Start with Selsun: Seb derm is common and very frustrating. It tends to come and go with stress, seasons, and sometimes what products folks are using.
Try washing in th... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 37-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
We can help!: Blackheads can be treated with a number of things, including a retinoid topical medication and, often, starting with some extractions (removal of the ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 33-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possibly: Anemia can be a cause of itch, but the list is very long and includes thyroid disease, kidney problems, eczema/dry skin, and certain cancers (such as ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
1 comment
A member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Needs an evaluation: There are a lot of reasons to be very itchy, from scabies infestation to eczema to liver or kidney disease. Each one needs different treatments so yo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 26-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Difficult for sure: Neurofibromas are fleshy and soft tumors that can look a lot like lipomas. Generally, lipomas are deeper under the skin, larger, and have a more broa... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 35-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Tea Tree Oil: I'm not sure about mangosteen or nutmeg powder for ringworm, but tea tree oil has been shown to help cure athlete's foot nearly as well as a prescript... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 36-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Probably: Keratosis pilaris is a very vexing problem that we do not have great answers for. However, many patients note large fluctuations of their kp during p... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 36-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Probably: There are a number of different types of hair loss, from alopecia areata, to telogen effluvium, to scarring conditions like discoid lupus and lichen p... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 39-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Hyperhidrosis: Increased sweating or hyperhidrosis is common:
http://dermnetnz.Org/hair-nails-sweat/hyperhidrosis.Html
there are prescription antiperspirants tha... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 56-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Everything has risks: Car accidents are an enormous killer of young, healthy people, but are a risk that many are willing to take to get around quickly and easily. Powerful... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 20-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possibly: Mrsa (methicillin-resistant staph aureus bacteria) infection of the skin can occur after irritation such as shaving. Usually it presents as a boil, b... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 23-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Finasteride and...: There are not great treatments for preventing androgenic hair loss. Finasteride is an oral medication that has been shown to help prevent and even re... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 29-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Lots of options!: Good moisturization helps protect the skin and makes it look softer and smoother; indeed, it is one of the central components to many "anti-wrinkle" c... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Yes indeed!: An infection on top of another infection is a called a "superinfection" and this is a common occurrence. If the skin is broken down (say, due to ecze... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 27-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possible allergy: There are several reasons to have itchy and thickened skin, but a common one is chronic allergy to nickel metal. Many pants (like jeans) have a metal... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 46-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
See your derm: Adult acne seems to be increasingly common and can cause red pustules and marks on the skin. Rosacea can also do this, as well as bacterial infections... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
See a Dermatologist: Discoid lupus causes a scarring type of hair loss and must be treated early and aggressively to prevent permanent damage to the hair follicles. Treat... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 25-year-old member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Sadly probably not: We are exposed to staph frequently (other people, household objects, even pets) so it is very difficult to avoid it completely. If the opportunity ar... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 47-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Yes: Rashes from medications can take several weeks to develop; some can even months or years after starting a medicine. This makes them very difficult to... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 22-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possible eczema: Dry, flaky skin around the nipples can be a sign of nipple eczema, which is not uncommon. The hormonal changes of pregnancy can induce eczema in some.... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A member asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Probably not.: White matter on the tongue that can be brushed off could represent thrush, a form of candida yeast overgrowth of the tongue. Although more common in ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Probably okay: There is a special version of Mupirocin (one trade name is bactroban) which is designed for the nose. That version is an ointment which generally is ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 52-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Maybe...: The eosinophils correlate with allergies, but the psoriasis is often thought of as the other "arm" of the immune system; we usually think of atopic de... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Melanonychia: Melanonychia is a brown-to-black line within the nail, frequently seen in patients with darker skin and often on multiple nails. It can be seen in ce... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 28-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Red scaling rash: Red scaling rashes generally fall into the category of "eczematous", meaning "like eczema". Eczema, seborrheic dermatitis, allergic or irritant conta... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 19-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Lymph nodes?: It is always concerning to have swollen lymph nodes so it is important to see your doctor to be sure it is not that. It could also be cysts, or a cond... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 38-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Often Age: As we get older, our nails often become more brittle and thin. Taking extra biotin, a safe supplement, has been shown to make nails thicker and strong... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 19-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Around the area only: Veet (and other similar depilatory products) can be used in the "bikini area", but should not be used on the genitals themselves or in the anal area. ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 59-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Angiokeratomas: These are probably not blood blisters, but rather angiokeratomas (of fordyce). You can read more about them here:
http://dermnetnz.Org/vascular/angi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 38-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Folliculitis?: Infection of the hair follicles commonly occurs on the trunk and is usually caused by staph bacteria. In widespread cases, usually oral antibiotics ar... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 29-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Possibilities: Dermatology is pretty visual, so it's hard to know what is going on without seeing it. Tinea capitis (ringworm of the scalp) can present this way, as ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 28-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Seborrhea: A red, sometimes itchy rash with scales, related to dandruff. It often is present on the scalp and around the nose and eyebrows, but can also appear o... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 22-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Time: Sometimes even the smallest bite will result in a dark spot that may take months or years to go away. Usually these are not true "scars" which are th... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 24-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Tough question: I think that there are situations where Isotretinoin can be used safely and effectively in patients with pcos, but it should be done under the guidanc... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 26-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Nerves: Flushing often occurs with anxiety or stress, but some flush easily even without stress. The sympathetic nervous system causes the widening of blood ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsAnswered >2 years ago
A 32-year-old female asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
It might be pigment: Sometimes after a bruise there is residual pigmentation (hemosiderin and/or melanin) that is left after the blood itself is cleared away. This can tak... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
A 26-year-old male asked:
Dr. Peter Lioanswered
Dermatology 22 years experience
Yes...but: It is probably safe to do this but it might not cover the marks. I have seen patients do this and if the stretch marks are not too large or red and t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
5.4k viewsReviewed >2 years ago
TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
3
Recommendations
32
Thank you notes
Dec 7, 2012
Dr. Lio is a highly regarded expert in atopic dermatitis (eczema) and is also a wonderful and kind person. You are in great hands if you choose him for your dermatologic needs.
HealthTap member
Mar 30, 2015
Dr. Lio is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Lio is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
This made me feel good. Thanks!
HealthTap member
This was very helpful. Thanks!
HealthTap member
This was very helpful. Thanks!
Awards
Full-Time Faculty Award, Northwestern University Feinberg School of Medicine, 2009
Mentorship Award, Northwestern University Feinberg School of Medicine, 2010
HealthTap Founding Doctor
Affiliations
Northwestern University
Northwestern Memorial Hospital
Lurie Children's Hospital of Chicago
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