Welcome and thanks for posting your query to Healthcare Magic.
After reading your whole query it appears that you are suffering from "Insect bite hypersensitivity"
This is a common phenomenon occurring after the bite of insects of any nature and even with mosquito too.
Kindly follow the suggestions below:
-Apply over the counter calamine
lotion 3-4 times a day.
-You can do cold water compresses to reduce the intensity of itching.
-Do not scratch or rub the skin as it can lead to further aggravation.
-Even if the rash is not reducing then can apply mild topical steroid
cream such has "hydrocortisone" or "fluticasone".
-you can take oral anti histamine
or levocetrizine wiht round the clock painkiller drugs by mouth under medial advise.
Despite above measures if the problem is worse then it is better to consult a dermatologist
for best guidance.
Hope these informations will help.
"With good health wishes"
Dr Sanjay Kumar Kanodia
MD (Dermatology & STDs)