Hello and thank you for the question. Answers given are for informational purposes only and are not meant to replace an exam by an in-person.
I am Dr. Sohaib, a practicing Internal Medicine Specialist and i will do my best to help you today.
You need to answer a few questions first which will help me assist you in a better way.
Since how long?
Is there any associated fever?
Itching on back of chest or back of throat (or both areas)?
Since @ noon yesterday, 7/13.
both areas, plus on stomach.
Itching on back, in throat and now on stomach area.
Is there any associated redness where you itch on the stomach/back?
Any concurrent medical illness you have?
Redness only after I scratch. No rash. No concurrent medical illness.
Thank you very much for the useful information.
This is most likely a result of allergic reaction (one can have allergies to number of objects like garments, bed sheets, environmental pollutants, pollens, dust, insect bite or even to some kind of foods.
A fungal infection of the skin can also be the trigger.
Benadryl is fine, but you may require topical steroid (1% hydrocortisone) along with anti-fungal cream (available over the counter) to be applied over the affected area of skin.
For throat, gargles with luke warm water.
All will help.
If the problem persist, does not improve or gets worse, see you doctor for further evaluation as this may requires prescription strength anti-inflammatory drugs or even a course of antibiotics for you throat (if required).
Stay adequately hydrated.
Keep your skin dry and clean.
Use only pure cotton clothings.
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