Closed mouth is a common skin problem, which refers to the part where pores are blocked and acne is not exposed on the skin surface. Generally speaking, the formation of silence is related to the following factors:

1. Excessive sebum secretion: When skin oil secretion is excessive, it is easy to block pores and lead to the formation of closed mouth.

2. Improper cleaning and nursing: Incorrect cleaning and nursing methods will cause skin damage, dryness, excessive irritation and other problems, leading to pore blockage.

3. External environmental influence: Air pollution, ultraviolet radiation and other external factors may also lead to the formation of silence.

4. Unhealthy diet: unhealthy diet and excessive intake of fat and sugar can easily lead to the formation of silence.

In order to avoid the formation of silence, it is suggested to pay attention to daily care, including cleaning the face with gentle cleansing products every morning and evening, avoiding using cosmetics containing alcohol or spices, and keeping the skin fresh and transparent. In addition, it is also important to maintain healthy living habits and eating habits, and try to maintain a good attitude and adequate sleep. If you have a silent problem, you can seek the advice of a doctor or dermatologist and choose the appropriate treatment according to the skin condition.