Children with red and swollen fingertips may have localized problems such as nail fungus, purulent dactylitis or purulent tenosynovitis, etc. They need to go to the hospital promptly for an interview with a doctor, who will make a preliminary judgment with a physical examination. If nail fungus is considered, timely trimming of nails, especially nails embedded in the flesh need to be removed in a timely manner, while giving iodophor disinfection and applying Bactrim, etc., will help recovery. In case of severe nail fungus, local removal of the nail along with anti-inflammatory drug drip should also be considered. In case of purulent dactylitis or purulent tenosynovitis, active antibiotics such as cephalosporin drip should be given. If the effect is not good and the local pus is high, surgical drainage is also needed. Pay attention to your child’s habits and avoid frequent nail biting to help prevent local infection.