The common reason for children's long nails is the wrong nail cutting: if the child has long nails, it may be that the nails were not cut well when trimming, and the nails were cut too short, which caused the problem of long nails. Therefore, parents must pay attention when cutting their baby's nails. Inappropriate shoes: When talking about the problem of shoes, remember a principle, as long as they are inappropriate shoes, don't wear them, because inappropriate shoes are likely to cause nails to grow inward. Toe injury: If a child loses a nail due to injury, it is easy to cause long nails when new nails grow out, so always pay attention to the safety of the child's feet. Repeated toe pressing: Sometimes repeated foot activities will cause toe pressing, such as repeated kicking, which will lead to long nails and nail problems. Insufficient foot hygiene: If the baby's feet are not kept clean enough, they will grow toenails organically, so be sure to clean the baby's feet carefully when taking a bath. Nail infection: sometimes nail infection can also cause toenails to grow in, such as onychomycosis and beriberi, so the feet must be kept clean and hygienic to avoid bacterial infection. How to prevent your child from having his nails trimmed incorrectly: You can teach your child to trim his nails correctly or help him trim them. Make sure the toenails are cut off directly, not too short, so that no toenails are embedded. Buy the right shoes: When buying shoes for your baby, make sure that the widest part of the shoes matches the widest part of your baby's feet, so that your baby won't feel uncomfortable or grow nails. Keep your feet dry: If your baby's feet are prone to excessive sweating, you can use socks to keep him dry, which can avoid foot health problems and nail ingrowth. Proper foot hygiene: Teach your baby proper foot hygiene and how to clean it. Babies should wash their feet regularly with soap and water to avoid bacterial infection and ingrowth of toenails. Prevention of foot pressure: If the baby can exercise, it is best to buy some suitable shoes to avoid foot injury caused by continuous pressure, which will cause the problem of toenail embedding and affect the baby's foot development. How to treat children's ingrown toenails can be repeatedly rubbed with 3% iodine tincture in the early stage, which can often control infection. When pus is not formed, it can be applied locally with fish fat paste and golden yellow powder paste. You can also use short-wave ultraviolet rays, ultrashort waves, infrared rays and other physical therapy, or use cotton pad method and hose pad method. The nail groove can be filled with glue dropping hose instead of cotton and bonded with special glue. Incision and drainage were performed after suppuration. Use lidocaine as nerve block anesthesia at the root of finger, and then cut it. For unilateral subcutaneous abscess, a parallel incision can be made outside the nail groove; Bilateral subcutaneous abscess needs bilateral drainage. After the abscess at the root of the nail is separated, remove part or all of the nail (but don't damage the basal tissue too much to avoid losing the ability of nail regeneration in the future) to fully drain the nail pus. It should be noted that both sides of the nail groove and the posterior nail fold cannot be cut at the same time, so as to avoid atrophy of the posterior nail fold wall, exposure of nail roots and abnormal nail growth. Chinese medicine treatment. Internal treatment: generally, internal treatment is not needed. If it is serious, it is advisable to clear away heat and detoxify, and add and subtract Wuwei Disinfection Drink and Huanglian Jiedu Decoction. External treatment: mix nail polish powder and honey evenly. If there is no wound, apply the medicine to the swollen part about 0.5cm and wrap it with gauze once a day. Principle: Fang Yaozhong has Chinese herbal medicines such as Curcuma rhizome, rhubarb, phellodendron bark, coptis root and cnidium fruit, which can clear away heat and toxic materials, reduce swelling and expel pus.