Suggest Treatment For Skin Allergy

Hello Docyor, i am Nivedita, 20 yrs, 49 kgs, 5.3 height from Jabalpur, i have froblem with my facial skin, i.e. whenever i move out of home i get little allergic type sructures on all over face which burns a lot and irritates a lot and this is increasing da by day even if m out fr 2 mins. i feel depressed due same and have literally stoped steping out. Since my child hood i have a problem that even if a mosquito bites it leaves a prominent mark on my skin which remains for months.. Please help me out..