Children with red and swollen fingertips may have localized inguinitis, purulent dactylitis or purulent tenosynovitis, etc. They need to go to the hospital for a doctor’s consultation, and the doctor will combine with the examination to make a preliminary judgment. If it is considered inguinitis, timely trimming of the nails, especially embedded in the flesh need to be removed, and at the same time give iodine povidic disinfection, apply Pepto-Bismol, etc., to help recovery. If it is a severe case of onychomycosis, it is also necessary to consider local extraction of the nail, along with anti-inflammatory drug drip. If it is purulent dactylitis or purulent tenosynovitis, actively give antibiotics, such as cephalosporin drip, if the effect is not good, the local pus is more, but also need surgical drainage. Pay attention to your child’s habits and avoid frequent nail biting to help prevent localized infections.