Hello,
Many possible causes are found for an itchy rash on the arms and legs. They are
allergic contact dermatitis, flea bites, fifth disease, allergic eczema, drug allergy, chicken pox, measles, herpes zoster, hand foot and mouth disease,
molluscum contagiosum, or
pityriasis rosea.
Only with thorough clinical examination, and few necessary tests, a specific diagnosis can be made. I can suggest few treatment options which are antihistamines like Benadryl and
Levocetirizine can be taken daily twice. Calamine lotion over the rash would help soothe the burning sensation. Topical usage of 0.2% hydrocortisone. Clobetasol 0.05% cream can be applied.
If your symptoms don't fade in 4-5 days, please do
consult a dermatologist for accurate diagnosis and appropriate treatment.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Pallavi M., Anesthesiologist