Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): The baby boy was born 11 days ago, a few days ago found that the skin on the balls and the root of the thighs is red and has broken skin, has been wearing diapers, each time the poop was washed with warm water, no improvement, please ask what should be done? Zhou Jing, Department of Dermatology, Shanghai Children’s Hospital: This may be diaper dermatitis, mostly due to excrement irritation of the skin or local bacterial or fungal infection caused by inappropriate diaper changing. Use a diaper with good breathability. If this treatment is not good for a week, go to the hospital for a fungal culture. PS: If the diaper rash is very serious with pus and erosion, or perianal abscess, please go to the hospital directly to avoid delaying the condition