U.S. doctors online nowAsk doctors free

Dr. Peter Lio

Dermatology
Chicago, IL
21 years experience male

Locations

Dermatology & Aesthetics of Wicker Park

Chicago, IL

Address

1455 N. Milwaukee Ave, 2nd Floor, Chicago, IL
Directions

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.

Specialties
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 29-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A female asked:
Dr. Peter Lio
Dermatology 21 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
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Anti-inflammatory: Elidel (pimecrolimus) is a topical anti-inflammatory cream that belongs to the class called calcineurin inhibitors. It works to calm inflammation in ... Read More
A 22-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A member asked:
Dr. Peter Lio
Dermatology 21 years experience
Need more info: Itching is a very common complaint and is seen with many skin conditions. I'm not sure about the black dots. These could be tiny broken blood vessel... Read More
A 19-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 59-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 38-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 24-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Hmm...need more info: Melanocyl is a powerful photosensitizer and is generally taken or applied before receiving light therapy. Usually either the cream or the tablet is u... Read More
A member asked:
Dr. Peter Lio
Dermatology 21 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
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Trichophyton: Trichophyton is one of the common types of fungus that can infect the skin, called a "dermatophyte". It can cause ringworm of the skin (such as athlet... Read More
A female asked:
Dr. Peter Lio
Dermatology 21 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
A 20-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Witch Hazel: Oily skin is difficult to treat, but wiping down with witch hazel can help take off some of the oil and make the skin feel better. This is much less ... Read More
A 26-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 24-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 18-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
Yes: Hormonal changes can cause increased sweating and during pregnancy there are major hormonal changes. Most likely this will improve after the pregnanc... Read More
A 37-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
See your doc ASAP : The itching and the blistering suggest that this could be an allergic contact dermatitis, perhaps to the adhesive from the bandages. But anytime there... Read More
A 18-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
2 weeks: A regular cold sore (herpes simplex virus infection) usually lasts about a week or two before fully crusting over. If something is still going on aft... Read More
A 47-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 30-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
Hmm...need more info: Bruising can mean low platelets and must be checked by your doctor. I am not sure if by knots you mean cysts, blisters, or bumps. Things that come a... Read More
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Dermatofibroma: A small, firm papule that is most common on the legs of adult women. These scar-like bumps often appear after a bug bite, shaving nick, or ingrown hai... Read More
A 19-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 26-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 32-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 22-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 58-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
Worth a checkup: It's not much to go on, but this could be how a pre-cancerous skin lesion called an actinic keratosis presents. Small skin cancers such as basal cell... Read More
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
Body lice: Body lice (pediculus humanus corporis) are similar to head lice. These are tiny parasitic insects live on the clothes and can often be seen at the sea... Read More
A 52-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 28-year-old male asked:
Dr. Peter Lio
Dermatology 21 years experience
HSP: Henoch-schonlein purpura (hsp) is a type of inflammation of the blood vessels (vasculitis) most often seen in children. It can present with petechiae ... Read More
A 35-year-old female asked:
Dr. Peter Lio
Dermatology 21 years experience
Viral exanthem: This is probably a viral infection with an exanthem, the rash associated with the virus. You can read about them in detail here: http://www.Dermnetnz... Read More
A 38-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 25-year-old member asked:
Dr. Peter Lio
Dermatology 21 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
A 39-year-old member asked:
Dr. Peter Lio
Dermatology 21 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
A 18-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 42-year-old member asked:
Dr. Peter Lio
Dermatology 21 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
A 46-year-old member asked:
Dr. Peter Lio
Dermatology 21 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
A 36-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 39-year-old member asked:
Dr. Peter Lio
Dermatology 21 years experience
Hyperhidrosis: Increased sweating or hyperhidrosis is common: http://dermnetnz.Org/hair-nails-sweat/hyperhidrosis.Html there are prescription antiperspirants tha... Read More
A 37-year-old member asked:
Dr. Peter Lio
Dermatology 21 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
A female asked:
Dr. Peter Lio
Dermatology 21 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
A 27-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 23-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 56-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 33-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 20-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 26-year-old male asked:
Dr. Peter Lio
Dermatology 21 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
A 21-year-old female asked:
Dr. Peter Lio
Dermatology 21 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
A 27-year-old female asked:
Dr. Peter Lio
Dermatology 21 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

90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.

Ask doctors free
Answer emailed
in 24 hours or less

Testimonials
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
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less