Suggest Treatment For Itching In The Arm And Legs

since two days i have hard itching in my fore arm and leg. is it due to change in placed( as i shifted from my home(surat, gujarat) to my college (kharagpur, west bengal)) or is that because of insects those were arround me during the day before yesterday's night which are the insects normally attracted towards light.
please give me solution, i'm trying to resist myself from itching, but it is getting unbearable....