Dr. Joshua Davidson

Allergy and Immunology
CA
20 years experience male

Locations

Office

My office hours

Thursday: 8:00am - 5:00pm
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Insurances accepted

Aetna

Aetna Life Insurance Company

About

Bio

I'm originally from New York and grew up in Los Angeles. After attending Brandeis University in Boston for my undergraduate education, and Yale University for a graduate public health degree, I obtained my MD at UCLA. From there I completed a pediatric residency and a fellowship at National Jewish Health in Allergy/Immunology -- the #1 respiratory hospital in the United States. I'm here to help and am looking forward to it.

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.

Allergy and Immunology

Licenses

United States: California

Doctor Q&A

107 Answers
8 Agrees
The number of answers this doctor has agreed with.
A 30-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Get help!: It's probably not the books themselves, but the dust they carry. House dust is typically a combination of dust mites, pet dander (if pets are in the h... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Absolutely: For many patients there is a direct connection between activity in the upper airway (nose/throat) and lower airway (lungs). That is, when inflammation... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
It depends...: ...On the tick. Deer ticks, for example, are often the carriers of the bacteria associated with lyme disease, a chronic and potentially debilitating c... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Yes: Technically yes, but people who have an allergy to a tick bite are likely sensitive to any bites, i.e. Mosquito, sand fly, etc. Topical anti-inflammat... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 40-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
An old connection: Many years ago, before modern allergies were even diagnosed, physicians and scientists realized that exposure to hay caused typical allergy symptoms f... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 27-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Most, but not all: People who have allergies to tree or grass pollens typically have trouble in the early spring. Those with allergies to weed pollens or mold spores hav... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 40-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Absolutely: Asthma and COPD are technically two separate processes, though more research is showing similarities between the two. Both conditions are considered "... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 55-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Healthy fat is best: Technically any fats will improve absorption of Ribavirin and limit systemic side effects like nausea. Common sense rules apply to these fats, as they... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Not usually: It can be a sign of asthma, which is characterized by bronchospasm, or the tightening of muscles around the airways. When a person coughs or laughs to... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 27-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Yes: It is quite normal, especially if a person experiences swelling as part of their reaction.
Created for people with ongoing healthcare needs but benefits everyone.
A 53-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
A lot: There are guidelines for total radiation exposure associated with commercial flights. A typical airplane flight will expose a person to roughly 1 mill... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 24-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
No: But, you can be allergic to a dye that is used in the preparation of a given vitamin.
Created for people with ongoing healthcare needs but benefits everyone.
A 39-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Symptoms and testing: There is a lung function test called spirometry that may be performed by an allergist or pulmonologist in an office setting. It involves breathing int... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Possibly: A negative spinal tap is usually a good sign in terms of ruling out ms, but it's not the only sign, and it depends on the tests performed on the spina... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 27-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
There are a few: Anaphylaxis is the term given to a systemic hypersensitivity reaction. It's where the body's immune system identifies a "harmful" substance and genera... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Sunlight: Hi there, i'm assuming if you've "tried everything, " that would include most topical and systemic medications. One of the best treatments for plaque... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Slightly higher: I would actually say your chances are slightly higher with a concurrent history of asthma. It is well known that gerd can trigger asthma symptoms, so ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Yes!: Singulair (montelukast) is one of many options for allergy treatment. Singulair (montelukast) is known as a leukotriene receptor antagonist. I know, n... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Ignore: Many symptoms can be treated with moisture alone. A 10-15 minute warm shower goes a long way!
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Two ways: Typically there are two ways to check: allergy skin testing through an allergist's office, or via blood work that may be obtained by visiting any phys... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Sinus infection: The head pain and dizziness suggest more than a typical upper respiratory infection. The post nasal drip could be draining from the sinuses as well. Y... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 40-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Likely not: Aerd raises the ante so to speak. Those patients have the added concern of respiratory distress that other patients may not experience despite a NSAID... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 36-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Cetirizine? It can.: Yes, in some cases Zyrtec, or cetirizine as a generic, can help with bug bites. Sometimes it's not quite enough, however, and stronger antihistamines ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Unclear: I think I can see what you're asking in regard to IgA and transplant medicine. However, I'd like to make sure. If you're worried about IgA nephropathy... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 59-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Generally not: It is generally not considered contagious, as it is typically a fungal infection of the glans penis -- usually an issue with poor hygiene in an uncirc... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Highly unlikely: At your age that's highly unlikely, but bronchitis and/or asthma could definitely be playing a role. The fact that Advair helped is a big clue, as tha... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Sensitivity: Alcohol is a typical cause for non-allergic symptoms, and that could explain the nasal congestion you're experiencing. The other symptoms are troublin... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 50-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Unfortunately not. : While it can lead to sedation, typically it is not a first line option for vertigo. Ultimately it depends on the cause of the vertigo. Occasionally an... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 21-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Unlikely: Considering your results, it's unlikely. But one way to learn more is to look at what's called the differential on that test. It lists a series of whi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 21-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Possibly: Contact allergies can occur when an allergen is in contact with the skin. Body washes, detergents, perfumes/colognes, cosmetics, metals, etc., can all... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
You need help!: Sounds like a delayed immune response to the mold exposure. History of asthma? You may benefit from inhaled medications to decrease the congestion/cou... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Happy to help: As you mentioned, those types of reactions occur in patients with a very strong immune system or response. This type of immune system is often associa... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old male asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Rarely, but it can.: Laryngopharyngeal reflux (LPR) or silent reflux can rarely lead to sinus disease in addition to more common symptoms. Sinus disease can in turn lead t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Possible eczema: Many possibilities. I noted hydrocodone is one of your meds. As an opiate, it can routinely cause itching and/or rash. The location of your itching an... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 63-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
It depends: While that level of lymphocytes is low, there are reasons why a person can have low levels, many of which are part of a normal immune response. When a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Absolutely: There are many possible causes for the symptoms you describe. Immune reactions arise in many different ways, some allergic, some not. In your case, th... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Sure.: Yes, hydroxyzine is fine, but it's fairly similar to Benadryl (diphenhydramine). You may prefer Zyrtec, Allegra or Claritin, as they won't make you as... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Many conditions!: It's true that vitiligo causes a hypopigmentation via loss of melanin in certain areas of the skin. However, common superficial fungal infections, ato... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Soon: It sounds like you've had a contact dermatitis/allergy reaction to the baby oil. Unfortunately, that specific baby oil contains an ingredient that met... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old female asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Antihistamines: As an allergist I'm seeing A LOT of these types of symptoms with my patients. Antihistamines, or allergy medications, can help. I recommend OTC option... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Get evaluated!: You would probably benefit from an evaluation with an allergist/immunologist where testing can be performed to determine the strength and function of ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Pollen: Pollen are microscopic "seeds" essentially, that help plants expand and grow in new areas. They are designed to float in the air and travel to these n... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
It depends: Great question. It really depends on two factors: 1. The severity of the reactions, and 2. The frequency of the reactions. When the reactions become t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 33-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Possibly: Salmonella outbreaks have been sourced back to peanut butter in the past, so it's certainly possible that peanut can carry the bacteria.
Created for people with ongoing healthcare needs but benefits everyone.
A 35-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Other medication: People who are truly allergic to Aspirin can undergo a procedure called Aspirin desensitization to allow for Aspirin consumption. If you're interested... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
No: It just implies that you have a tendency to develop changes in your airways that are consistent with asthma. These include swollen lower airways, incr... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 36-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Probably not normal: It could be allergies, or it could be a sign of infection or asthma. Typically the mucous either drains from the nasal passage/sinuses down into the t... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Unfortunately, yes: Yes, it is possible. The skin infections often recur in the same patient. Athlete's foot, for example, is a common type of fungal infection that may o... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 21-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Not necessarily: Gerd can run in families, but genetics alone don't typically cause gerd. What also runs in families are dietary habits, obesity and other risk factors... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old member asked:
Dr. Joshua Davidson
Allergy and Immunology 20 years experience
Inflammation: Any inflammatory response can lead to the sensation of a "knot" under the skin. This common reaction is seen after vaccinations in muscles. Any punctu... Read More
Created for people with ongoing healthcare needs but benefits everyone.

Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

7
Recommendations
259
Thank you notes
Aug 15, 2014
Dr. Davidson is very knowledgeable in his field of Allergy/Immunology. I gladly refer my patients to him
HealthTap member
Oct 2, 2011
Answers are well defined and understandable. Thanks doc for the second opinion!
HealthTap member
Mar 30, 2015
Dr. Davidson is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thanks doc! I took naproxen sodium to ease the pain for my swollen foot. It helped the pain but my eye swelled badly after about an hour later.
HealthTap member
Thank you so much, i will go to my doctor first thing tomorrow and advise him on the tips you gave me. Thanks.
HealthTap member
Thank you, your quick reply made me feel good! Thanks I thought something was wrong with my stomach

Education & Training

Medical/Graduate school

UCLA School of Medicine, CA
Graduated 2003MD

Residency

Harbor UCLA Medical Center
Completed 2006

Awards

HealthTap Founding Doctor

Affiliations

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