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Doctor insights on: Allergic Reaction Rash

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Dr. John Chiu
2,606 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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How do I tell what is causing my allergic reaction rash?

How do I tell what is causing my allergic reaction rash?

Timing: It depends on the timing. The contact with the allergens, either through skin or oral, usually happens days or weeks ago. Person's recall history is crucial. Tests are unreliable or not available. Read more

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How do you know you what type of allergic reaction rash you got?

How do you know you what type of allergic reaction rash you got?

Rash trigger: Dear CDean, It would depend on what triggered the rash and what it looks like and your symptoms. Best to have a health care professional see the rash to determine the type. Read more

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How long does it usually take an allergic reaction rash to go away?

How long does it usually take an allergic reaction rash to go away?

Variable: Hives or urticaria may wax and wane then resolve within a day or 2 after ingestion or contact with a food allergen. However, poison ivy or nickel allergic contact dermatitis may take 4-6 weeks to eventually resolve. The time to resolution is also impacted by what medications are taken such as oral corticosteroids such as prednisone, which can decrease the time significantly. Read more

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How long does an allergic reaction rash from echinacea last?

How long does an allergic reaction rash from echinacea last?

A few days: Rashes from something you ingest typically last for just a few days or less. The bigger question is what really caused the rash. People break out in rashes from time to time, and it's just human nature to blame the rash on something we ate in the last few hours. If the rash is continuing for more than a week, it probably has nothing to do with the echinacea; you should see your pcp to check it out. Read more

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How to get rid of an allergic reaction rash?

How to get rid of an allergic reaction rash?

Allergic rash: Usually it takes prescription medications, such as topical and sometimes oral steroids. Read more

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Why is my skin gray after an allergic reaction rash?

Why is my skin gray after an allergic reaction rash?

Trauma: Need to know what is the normal color of your skin. The greyish coloration is likely from the residual of the allergic inflammation or from scratching and should subside within weeks if the allergic reaction was the cause. I assume that this is a case of contact allergy. Read more

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How to tell a heat rash from an allergic reaction rash?

How to tell a heat rash from an allergic reaction rash?

More localized: Allergic rash often hive or welt like may be more diffus, heat rash in warmest areas, groin, axilla, flexor creases. Read more

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Are there sure ways to get rid of this allergic reaction rash from a pill?

Are there sure ways to get rid of this allergic reaction rash from a pill?

Time and meds: Most medication reactions will begin to improve within 48 hours after stopping the medication. To ease the symptoms of a drug allergic reaction, antihistamines such as zyrtec, Claritin (loratadine) or Allegra can help. On occasion oral steroids like Prednisone are needed. If the rash is blisters or progressing, then a doctor's visit is important for further evaluation and treatment. Read more

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Benadryl (diphenhydramine) tabs take about 1 hour to start working to treat my allergic reaction (rash) Would Benadryl (diphenhydramine) IM be a faster alternative? Can I obtain an RX?

Benadryl (diphenhydramine) tabs take about 1 hour to start working to treat my allergic reaction (rash) Would Benadryl (diphenhydramine) IM be a faster alternative? Can I obtain an RX?

Depends: Benadryl (diphenhydramine) may help hives but not a rash which has lasted more than 24 hrs. IM Benadryl (diphenhydramine) gives you perhaps a 30-minute head start vs oral = not worth the cost or hassle. If you have throat swelling, you may need adrenaline and an allergy consult since this can be life-threatening. Read more

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Have allergic reaction rash was given prednisone to take 60mg a day for 3 days, this seems like a lot. Do I need it or will they go away on their own?

High dose: There is no one correct dose for oral steroids, but most clinicians would dose according to the severity of the allergy or that particular person's previous response to oral steroids. 60 mg of prednisone is a high dose for some rashes such as hives but may be necessary for generalized allergic reaction like anaphylaxis. IDouble check with doctor to make sure that is the correct dose. Read more

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How can you get rid of an allergic reaction rash that's on my face and neck? Help?

How can you get rid of an allergic reaction rash that's on my face and neck? Help?

Allergic reaction: If it is true allergic reaction, then avoidance of the allergen will curb the reaction hopefully. Using an anti-allergy preparation such as Benadryl (diphenhydramine) at night might help. Hydrocortisone cream once to twice daily on the affected areas excluding eyes may be tried for no longer than 2 weeks at a time. If those fail, definitely see a doc. Read more

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Possible to have latex condom allergic reaction (rash/dry/slight itch) 12-24 hours after sex every time, if no reaction after masturbation w condom b4?

Possible to have latex condom allergic reaction (rash/dry/slight itch) 12-24 hours after sex every time, if no reaction after masturbation w condom b4?

Latex allergy: You are exhibiting symptoms of latex allergy, and yes they can be secondary to condom use. You should use sheep skin condoms to avoid contact with latex, but careful they break easily. Read more

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Are there any over-the-counter products I could take to help with an allergic reaction (rash of red itchy red bumps all over my body?

Are there any over-the-counter products I could take to help with an allergic reaction (rash of red itchy red bumps all over my body?

Antihistamines: Depending on what the rash is from, you could try antihistamines like Diphenhydramine (benadryl). If you are having any respiratory symptoms like shortness of breath or throat swelling, you should be evaluated in the er. Read more

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Have been taking macropen for 6 days and now have a fuzzy feeling on tongue. Is this possibly an allergic reaction. No rash or other signs/. Thank you?

Have been taking macropen for 6 days and now have a fuzzy feeling on tongue. Is this possibly an allergic reaction. No rash or other signs/. Thank you?

Fuzzy tongue: No that's a FUNGAL over growth on the tongue from knocking out all the bacterial commensals in the mouth from 6 days of PEN. If you have normal T cells and if the overgrowth not too bad you can do nothing AND as the bact come back the fungi will go down. You can also get ANY anti-fungal OTC vaginal supp and suck one a day for 5 days and that will nail it too. Next time take antifungal Rx simultan Read more

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How can I tell the difference between a rash caused by allergic reaction and rash caused by flesh eating bacteria?

How can I tell the difference between a rash caused by allergic reaction and rash caused by flesh eating bacteria?

Red versus dead: An allergic reaction is manifested by a raised red firm sometimes itchy but usually limited area whereas flesh eating bacteria create a rapidly spreading area of redness with fever and pain. The skin may blisters itch fluid or air bubbles or become grey/black. Read more

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I wotre a knee brace that was too tight. On a knee that was already having an allergic reaction. The rash has spread all over my body? Help?

I wotre a knee brace that was too tight. On a knee that was already having an allergic reaction. The rash has spread all over my body? Help?

Benadryl (diphenhydramine) and call: Use Benadryl (diphenhydramine) to help with the rash symptoms for the here and now. Stop using the brace and call your physician. Read more

Dr. John Chiu
1,036 Doctors shared insights

Allergic Reaction (Definition)

Sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more


Dr. John Chiu
2,641 Doctors shared insights

Skin Rash (Definition)

A skin rash is a symptom in which a person has changes on part or all of his skin, such as color changes, bumps, blisters, oozing, peeling, ...Read more