It seems like your prakruti is sam
pittaj vata. This is giving some physiological problems with blood after bite.Solution=
1)Take Kaishore guggule 2 tab with milk twice(mor+eve)
2)Apply narayan/coconut oil on the infecteed area.
3) Avoid spicy things+hot beverages.
4)Take munnaka(10) at bed time.
Your hyper sensitivity also relates with stomach.This remedy will help u out.