It seems that you are having lichen urticatus,also known as papular urticaria
It is hypersensitive reaction to insects.
There appears erythematous papular lesions with mild to severe itching
Take short course of steroids
in tappering dose.
Take antihistaminics till itch is relieved.
Take antibiotics , if there is secondary infection.
Avoid soap bath.
Try to protect from insects.
I hope you would be benefitted.
Best health wishes.
Dr. Ilyas Patel MD