Normally, a child’s teeth erupt between 4-10 months. It is now normal for the first tooth to erupt within 12 months. If a child does not have a tooth after 12 months, it is considered delayed tooth eruption. The timing of a child’s tooth eruption is influenced by a combination of genetic, nutritional, and environmental factors, so the timing of each baby’s tooth eruption varies, and is considered normal as long as it is within the normal time frame. If the child’s teeth eruption is delayed, you need to go to the hospital in time to find out the cause and give symptomatic treatment in time. For babies under 1 year old, they need regular vitamin AD supplementation, and when the weather is good, you can take your child out to get some sunshine to help calcium absorption and facilitate the eruption of teeth. After the baby’s teeth have erupted, oral health care should be given in a timely manner to avoid dental caries and other conditions.