The itching like insects on the body is considered as follows: 1. Parasitic delusions: mainly due to mental disorders, which require oral administration of certain psychotropic drugs or sedatives, such as gabapentin capsules or pregabalin capsules. 2. Pruritus: due to severe medical diseases, such as cirrhosis, ascites, chronic renal failure, acute leukemia, treatment should be actively carried out to treat the primary disease, such as renal failure can be treated with dialysis and applied twice a day. For example, kidney failure can be treated by applying dialysis, and joint topical application of glyburide lotion applied twice a day. 3, herpes zoster: usually in the involved peripheral nerve sites appear insect crawling itching and other manifestations, treatment can be antiviral treatment, oral famciclovir tablets, topical acyclovir ointment.