Friction moss is a form of rash manifestation mainly due to repeated friction causing localized skin deepening with elevated skin crests and moss-like changes. In treatment, if accompanied by itching, you can take oral levocetirizine hydrochloride capsules, one capsule every night, combined with epinephrine hydrochloride capsules, two capsules every morning. And you can apply topical fluticasone propionate ointment, once a day at night, or mometasone furoate ointment, once a day at night. After applying the ointment, the affected area can be wrapped tightly with plastic wrap and left for 20 minutes before removing the wrap. This treatment is a packet therapy, which is 100 times more effective than the normal application of the ointment, and can be a good treatment for friction moss. During the treatment period, it is necessary to avoid repeated frictional stimulation, also need to avoid strong sunlight exposure, need to avoid spicy and stimulating diet.