U.S. doctors online nowAsk doctors free

Dr. Thomas Josa

Allergy and Immunology
San Carlos, CA
40 years experience male

Locations

Office

San Carlos, CA

Address

San Carlos, CA
Directions

About

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

Languages spoken

English

Doctor Q&A

457 Answers
155 Agrees
The number of answers this doctor has agreed with.
A 37-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Allergy or other: You would have to specify what you mean by yeast allergy. Are you experiencing and intolerance or some adverse reaction due to yeast in your body? A... Read More
A 34-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Typically no: but if you have a lot of sinus and ear congestion it could.
A 41-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No: Maternal antibodies are passed on to the fetus through the placenta. There are certainly genetic propensities and parts of antibodies that are passed... Read More
A male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Angular cheilitis: You probably have angular cheilitis. You could apply petroleum jelly or aquaphor to this and your lips frequently. If no improvement consider a topic... Read More
A 29-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Variable: Highly variable and depends on the type of reaction. If you are already allergic then the most severe reaction can happen right away. Some reactions ... Read More
A 35-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Definitely yes: If you are using the Flonase consistently then you may not need the Zyrtec (cetirizine) except on breakthrough days.
A 32-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Unlikely: Hives are common but allergy to Tums (calcium carbonate) and it's inactive ingredients is not. You need to look elsewhere.
A 17-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
More info: That must have been frightening but probably not worrisome unless you recently started some new medication. Some important questions are: Itching? P... Read More
A 19-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Immune system: I've seen this question before so I'll take a different approach. The immune system's defense is complex with multiple components just like branches o... Read More
A 20-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Unlikely: I understand that this is weighing heavily on your mind. Every test has some possibility of false negative results but the chance that your HIV test r... Read More
A 32-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No: Perhaps your eyes, nose and throat can feel dry but it should cause actual dehydration which can be evidenced by dark and minimal urine output.
A 18-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Needs investigation: After this long you need to get this evaluated to determine the source and cause of the bleeding. It could be blood from the nose, the sinuses but al... Read More
A 21-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Psoriasis: Your dermatologist can give you a more definitive diagnosis. Psoriasis is an autoimmune condition but one that is not diagnosed by the ANA test.
A 37-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Should be ok: Condoms used properly are effectively prevent the spread of HIV.
A 31-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Conjunctivitis?: I think you should get it looked at. I can speculate that If there are a lot of prominent blood vessels there can appear to be a white spot where the... Read More
A 36-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Recheck asap: Recheck it as soon as possible. Chances are it was transient in response to your acute illness but as sustained reading can be dangerous.
A 25-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Canker sore: Ouch, both are quite painful ! If it is not painful then it may be something else. Cold sores tend to return in the same spot on the border between ... Read More
A 33-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
What's the infection: It's too soon to determine whether the Azithromycin is working yet. Whether you go back to the doctor depends on what and how serious the infection is... Read More
A 22-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Not an allergy: Perhaps you have an ordinary viral upper respiratory infection. I sympathize with your desire to not come down with the flu since it is so debilitati... Read More
A 22-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Yes: This sounds suspicious for sinusitis or even a pneumonia. See your doctor to determine if any specific treatment is indicated.
A 36-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Nasal saline: Gargle with salt water Saline nasal sprays cough drops honey
A 40-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Gravity: Gravity can play a role. Just to illustrate this, it is physiologically normal for even the dependent side of the nose to become more swollen than the... Read More
A 38-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Antimicrobial agent: No one really knows why people become allergic to this drug or any other for that matter. It attaches to a protein molecule as a hapten and the immun... Read More
A 20-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Depends on how much: Depending on how strong the solution was. Nothing to freak out about but I don't recommend using it. Don't you hate those annoying stones!
A 16-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Could be yes: Many students have low grade or smoldering allergy to pets while living at home that become acute after returning home from school. Allergy to parrot ... Read More
A 40-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No: Probably not but a middle ear infection and sinus infection can coexist. Infections of the ear canal can be quite painful. Do you have an injury or ... Read More
A 20-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Not additctive: No need to worry about getting hooked on it or loss of efficacy. If you find that it doesn't work as well as before then it's likely that your condit... Read More
A 32-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Angioedema: What you are describing is Angioedema. It comes on suddenly at random, often very inconvenient times and can be quite embarrassing. It may be caused... Read More
A 18-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No benefit: Yes, but there is no added benefit to take the Allegra (fexofenadine) since it doesn't help much when you have a cold. An older antihistamine like Chl... Read More
A 36-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Maybe: Vocal Cord Dysfunction can easily be confused with asthma and can be tricky to diagnose. Both can coexist. Mucous production is not a direct result... Read More
A 26-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Have it looked at: This could be a number of things like a sebaceous cyst but can't be diagnosed without an exam. Please see your doctor.
A 45-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No: I have not heard any that dairy can weaken the immune system. Some people mostly young children have a hypersensitivity or allergy to milk protein. ... Read More
A female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Cold urticaria: It sounds like cold urticaria. Antihistmines can help. Keeping your body and extremities warm is the obvious solution. A severe outbreak could eve... Read More
A 25-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Sinuses: That's a long time to be suffering ! The sinuses and ears all drain into the nose and upper throat and can be affected by infection, allergies or othe... Read More
A 26-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Yes: Keep the cat out of the bedroom HEPA air filter appropriate for the room size HEPA vacuum cleaner Smooth surface flooring and furniture Consider a nas... Read More
A 23-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Asthma?: This sounds a lot like asthma and you need to get this under control. Another possibility that can do this is silent gastresophageal reflux. Please s... Read More
A 19-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Dark marks: This can be particularly difficult to determine without viewing the marks and their distribution. Diabetes was a good thought. Glad you don't have i... Read More
A 34-year-old member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Several kinds: Commercially available saline nasal sprays , mists, drops or nasal saline lavage solutions also contain bicarbonate (sodium bicarbonate) for pH balanc... Read More
A 24-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Quickly but: To really notice it may take days depending on the type of microbe. FYI: IgM rises quickly while IgG antibodies can take 3-4 weeks to peak. Not all ... Read More
A 20-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Infection?: A bit of tenderness due to inflammation during the healing process is to be expected. If increase redness, swelling , pain or pus develop then you sh... Read More
A 33-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Complex: No easy answer here. Needs an evaluation to look for allergies, other lung conditions and even acid reflux disease.
A 21-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Dermatitis: If you are talking about the face it is possibly acne. A photo would be helpful.
A 49-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
No: I assume your lung function is close to normal. The altitude itself will not trigger asthma, cold air might. People with severe Asthma, COPD and/or Em... Read More
A 20-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Unusual cause: Sounds like hives. From your age I'm guessing your son is quite young. If he normally tolerates milk egg wheat and soy and the chorizo did not someho... Read More
A 23-year-old male asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Many things: Is it diarrhea with watery stool or is it bulky, loose stool? Is it really malabsorption? Consider Pancreatic conditions, Lactose Intolerance, gluten ... Read More
A 30-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Dry skin: Dry skin is the most likely cause of itching without a rash especially in winter. Try Dove soap and moisturize the skin frequently. Creams last long... Read More
A member asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Irritant reaction: Hydrocortisone or a stronger topical steroid can help. Why would you deliberately put toothpaste on your skin I wonder?
A 30-year-old female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Could be: It depends on a number of other criteria that your doctor can help sort out with you.
A female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Minutes to hrs: Any active bleeding should have stopped by now just like a cut in the mouth would though some residual blood may have pooled in the vagina.
A female asked:
Dr. Thomas Josa
Allergy and Immunology 40 years experience
Prolapse: I think you got it right. Although you didn't provide your age or OB history I'll assume you are a bit older and have had children in which case this ... 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.

1
Recommendations
268
Thank you notes
Dec 22, 2015
highly recommend
HealthTap member
This was very helpful. Thanks! The MD is not in my PPO. The allergist had no answer to me when I guessed out loud that my issue is due to A/C. He was quiet and gave me an Rx. I will approach him again...Read More
HealthTap member
This was very helpful. Thanks! Thank you for your answer! Took several wks of Iver ending 1mth ago.Cleand daily.Keep getting little bumps on neck.Maybe just over-sensetive skin.Hoping for the best. De...Read More
HealthTap member
Thank you; I've always hesitated drinking tea because I am allergic to so many things otherwise and didn't want to risk it. Nice to know I can probably enjoy it harm free.

Education & Training

Medical/Graduate school

University of Copenhagen Faculty of Medicine, Denmark
Graduated 1982MD

Residency

MORRISTOWN MEMORIAL HOSPITAL
Completed 1986

Awards

Top Allergist and Immunologist, First Place, the San Mateo County Region - Spring
2017

Affiliations

American College of Allergy Asthma and Immunology
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