Ane. Abnormal digestive system, poor appetite, constipation, diarrhea, abdominal distention, lips will be black;
Two. Black deposits and deep stains may be chronic adrenocortical hypofunction or long gastrointestinal polyps and syphilis. People with black or purple black spots may be deficient in vitamin C.
It might be something wrong with the digestive system; such as lip edge pigmentation, may be renal insufficiency; Heizi is obvious symptoms of blood oxygen; others such as pneumonia, heart failure, asthma, pulmonary heart disease, constipation, abdominal pain, diarrhea can appear such symptoms.
There are many reasons for the blackening of the lips. Therefore, the doctor should be asked to check, find out the exact cause, and treat it in time.