Newborns can cut their nails after birth, especially children with long nails, because the nails are too long children are prone to scratch themselves, and long nails are prone to breeding bacteria that cause infections, so newborns with long nails should be trimmed in time. The traditional view that you can only trim after the full moon is not based on science. The newborn nail clippers should be chosen for newborns, newborn nails are very soft, with special nail clippers will not hurt the child. The nails should not be cut too short and the edges should be repaired smoothly to prevent the child from scratching himself. The nails should be cut when the child is sleeping and the room should be well lit.