Every year, starting in late October, as the weather turns cooler, the number of patients coming to the dermatology clinic for treatment of pruritus in the elderly gradually increases. The disease is mostly caused by aging and atrophy of the skin, the decrease of sebaceous and sweat gland secretion function, the decrease of water content of the skin, the lack of sebum moisturization, and the susceptibility to stimulation by surrounding environmental factors. The main manifestation is itching, which is aggravated at night. Due to scratching, scratch marks, blood crust, pigmentation and moss-like changes may appear on the skin, and in severe cases, skin infection may occur. In severe cases, oral antihistamines (such as paracetamol, etc.) or tricyclic antidepressants (such as Doxepin, etc.) can be taken. Conditional bath therapy is available. Such as: bran bath: wheat bran or rice bran 1000g ~ 1500g, add water and boil for 15 minutes, filtered and poured into the bath directly wash with. Starch bath: starch or 250g ~ 500g, add water and boil, put into the bath tub for bathing.