It seems that you are having insect toxic dermatitis
You should take all precautions to prevent further insect bites
Take antibiotics for 2 to 3 weeks.
Take anti inflammatory drugs to reduce pain and swelling.
Take short course of steroids
in tappering dose .
Take antihistaminics to prevent itching.
Avoid soap bath.
Apply antibiotic cream.
Wash the affected area with antseptic liquid.
Improve immunity by taking immunobusters.
You should go for blood tests to rule out DM,HIV,anaemia or other internal diseases.
I hope you will be alright.
definitely you should consult dermatologist
Wishes for early cure.
Dr. Ilyas Patel MD