It seems that you may be having lichen urticatus.
The cause would be hypersensitive reaction to insects..like ticks.
There may be itchy papular eruptions any where on the body.
Take anti histaminics like levocetirizine
till, you feel better.
If the condition is embarrasing, you may take sterois in tappering dose.
Apply combined cream of steroids
Avoid soap bath.
Important thing is to be away from insects.
For that, you may use insecticide to keep the room insect free.
I hope you got my answer.
Dr. Ilyas Patel MD