Oral health care needs to know the following issues: 1, the growth of teeth to protect. In infants and toddlers around 6 months old to grow the first milk teeth, oral health care has to be done. After the child has eaten, wipe with a cotton swab soaked in water. When the child is older, parents can buy a finger toothbrush and help the child brush his teeth until he can take care of himself. It is important to teach children the correct way to brush their teeth, to brush their teeth in the morning and at night, and to learn to floss to better clean the gaps between their teeth. 2. To develop a good habit of seeing the doctor regularly. No matter adults or children, it is better to go to the dentist for a checkup once every six months. Children can check whether they have tooth decay, whether they need to do sulcus closure, whether they need to do fluoride caries prevention, etc. Adults can do oral cleaning (scaling), periodontal care, etc. In this way, early detection and early treatment of dental disease can be achieved. 3.Orthodontics is not only for aesthetics, but also to restore the normal bite relationship. The tilted teeth will inevitably bear greater lateral force and have a much greater chance of falling out than the teeth that are aligned neatly under the effect of the vertical bite force that they have to have every day. In clinical practice, we often see early tooth loss due to misaligned teeth. Aligned teeth are also good for periodontal health, reducing the production of calculus and food ingrowth. Orthodontics during the growth and development of children can also guide the development of facial shape, so that the ground can be partially improved, small chin. 4, toothache must go to the hospital as soon as possible. Oral diseases, especially dental diseases, have almost zero possibility of resolving on their own. It is not like a fever or cold, just take some anti-inflammatory drugs, dental diseases can only be treated with the assistance of a doctor. 5. Wisdom teeth that are not functional are recommended to be extracted as early as possible. Many people’s wisdom teeth, if extracted early, will not be repeatedly inflamed and will not cause caries of the adjacent teeth. In the clinic, we have met many patients who are reluctant to extract their wisdom teeth after their peri-coronitis is well, until the front teeth are also spoiled, which is a pity. In some patients, the temporomandibular joint is always painful, but after the wisdom teeth are extracted, the joint problem is also improved. Therefore, there is no use of wisdom teeth, a hundred harm but no benefit. 6. Don’t be afraid to go to the stomatology department. With the development of medical science, the treatment technology of stomatology has also been greatly improved, and the development of painless technology makes the treatment process safer and more relaxed for patients.