I feel that you might be having lichen urticatus, also called papular urticaria
It is a hypersensitive reaction to insect bite.
There may be itchy erythematous papules at discrete places.
Antihistaminics like levocetirizine
may be taken.
Antibiotic like cephalaxine may be taken for short period.Steroid
intappering dose may be taken if the disease gets severity.
Avoid soap bath.
Try to be away from insects... Insecticides may be used to be free from insects.
I hope you got my answer.
Dr. Ilyas Patel MD