The baby’s mouth knocked through the lip, you need to choose the best treatment according to the depth of the wound, such as ice cold compresses, iodine vapour disinfection, pressure to stop the bleeding, clean stitches and injections of medication, and so on. 1. If the baby’s lip is only slightly broken skin, a small amount of bleeding, you can first use a dry towel wrapped in ice cold compress to promote vasoconstriction, to help stop the bleeding, reduce swelling, and then apply iodine povidone to disinfect, usually a few days after the wound can be self-healing. 2. If the baby’s lips appear deeper, larger wounds, bleeding is also large, you need to immediately use a clean towel to compress the wound to stop the bleeding, and immediately go to the hospital for debridement and suturing, may also need to be injected with immunoglobulin within 24 hours to prevent tetanus. Diet also needs to be light, avoiding spicy and stimulating foods and foods that are too hot, which usually have a longer recovery period. It is the nature of children to be active, especially babies who are learning to walk, parents need to strengthen the care, avoid babies climbing in dangerous places, avoid babies touching dangerous objects, parents need to correctly guide to ensure the safety of babies.