How is a pustule growing on my child's buttocks to return a responsibility? They say folliculit

The pustules on the skin of the child's buttocks may be furuncle carbuncle, caused by Staphylococcus aureus infection, and local skin hygiene is poor, long-term in high temperature, sweaty environment. It is recommended that parents take their children to see a dermatologist for a clear diagnosis, suppurative symptoms require surgery to open drainage to discharge pus, and then external antibacterial treatment.