Causes of formation: 1. Excessive hydration and temperature increase of the skin caused by local humidity. 2.Friction of local skin. 3.Soaking of urine and feces. Prevention: 1.Keep the skin of diaper area clean and dry. 2.Use barrier protective agents, such as petroleum jelly, zinc oxide, moist burn cream, etc. Clinical application of moist burn cream is very effective, and no adverse reactions have been found so far.