Normal lip color is mostly pink, if the color of red is too bright or deep purplish red, that is, the lips of the mouth are flushed. Under pathological conditions, such as inflammation of the oral mucosa, or bacterial infectious diseases, cardiovascular diseases, digestive system diseases, etc. Etiology: In general, it may be caused by what is commonly known as “fire” in the body. If it is accompanied by bad breath and erratic, it means damp heat in the spleen and stomach; if it is accompanied by distension and pain in the two sides and anorexia, it means that the liver fire is too strong. Pathological conditions such as inflammation of the oral mucosa, bacterial infectious diseases, cardiovascular diseases, digestive system diseases, etc. can also be associated with the appearance of this symptom. As well as gingivitis and other diseases caused by the above performance. Diet: Suitable to eat: 1, it is advisable to eat high fiber content of herbs and vegetables. 2.It is advisable to eat foods rich in vitamin C. 3.It is suitable to eat fermented dairy products. 4.It is advisable to eat fruits rich in trace elements and minerals. 5. It is advisable to eat foods that are cold in nature. For example, celery, a class of herbs for the elimination of odors, especially the smell of smoke is the best effect, and help digestion. It is not recommended to fry in oil, you can take boiling water and eat cold, like parsley, mint and other foods similar to celery can be cleaned and chewed directly. It can be consumed 2-3 times a week. Drinking yogurt can reduce the level of hydrogen sulfide in the mouth, which is the culprit of many kinds of oral odors. Do not and sugary yogurt, but drink natural yogurt, basically you can insist on drinking yogurt every day.