Welcome to healthcare Magic!
You are having chronic simple urticaria
which is an allergic condition leading to bumps whenever you contact the allergen.
Try to find out some thing new to which you have come into contact and after which the problem started.
It can be an unsuspected article like a deodorant spray, scented oil, fairness cream, shaving lotion, new additive for cooking.
You should take tablet Levocetirizine
5mg at bed time for a month.
Wish you a great health!