Babies usually start teething 4-7 months after birth, and a few may be 10-12 months old, which is related to genetic factors and their nutritional status. Before the baby’s teeth erupt, there will be some abnormal manifestations, such as irritable crying, increased drooling, loss of appetite, fond of biting fingers, etc. Some of them may be accompanied by congestion and swelling of gums, as well as mild fever and diarrhea. Most of them are normal and can be gradually relieved by themselves, and no special treatment is needed. Influenced by genetic factors and their own nutritional status, each baby’s growth and development varies, and so does the rate of teething. If your baby is late in teething, it may be due to a deficiency of trace elements in the body, so it is recommended to go to the hospital for a trace element test. Commonly due to calcium deficiency, you can take appropriate amount of calcium supplements, or eat more calcium-rich food. More sunshine will help the absorption of calcium. During the teething period, babies should pay attention to keeping their mouths clean and hygienic, balanced nutrition, regular rest and rest, and can be given teething sticks to relieve the discomfort of the gums.