It seems that you may be having either delusion
of parasitosis or dysaesthesia of unknown origin. Take fluoxetin 10 mg one morning daily till you feel better. Ant histaminic like levocetirizine
may be taken at night. Avoid anxiety
Wear cotton clothes. Avoid soap bath. You may be improved. Have blood tests to rule out internal diseases. You may consult dermatologist
I hope you got my answer.
Dr. Ilyas Patel amD