Welcome to HCM.
Thank you for your question.
Rashes like itchy papules and blisters on the exposed areas that is your arm and feet means you are having a condition called as Papular Urticaria
or insect bite allergy
. Possibly Mosquito bite allergy
also. You can wear full sleeves shirt and fully covered night pants and also you can apply some insect repellent creams. Anti histamines
like Cetrizine and systemic Antibiotics also will help you to get better. Another possibility is some contact allergy
like detergents, cleansing agents, ornaments, occupational contacts etc. You consult a drematologist and he/she will help you better.
Get well soon.