Purple-black lips in men are not necessarily due to liver problems, but may also be related to poor blood circulation and lack of vitamin C in the body. There are more reasons for men’s lips to turn purple and black. If the liver is severely damaged and liver function is significantly reduced, it can lead to the phenomenon of dark lips. In addition, in cases where the body is colder or suffers from heart disease, the peripheral circulation is poorer and the lips can subsequently develop purple-black symptoms. In addition, diseases such as severe anemia, chronic hypoadrenocorticism or digestive polyps can cause this condition and require differential diagnosis. If men’s lips turn purple-black, they should be alerted and seek medical attention as soon as possible to identify the cause through examination and treat the cause accordingly. In life, you should pay attention to avoid staying up late and other bad habits, and do moderate exercise to enhance physical fitness.