A dark face is not necessarily caused by disease, but may also be caused by ultraviolet radiation and irregular lifestyle, some diseases such as melioidosis, liver and kidney disease will appear dark face. A dark face is not necessarily a sign of certain diseases. Normal people who are exposed to too much ultraviolet radiation, which leads to pigmentation of the face, will also have a dark face. If the irregularity of life habits, such as long-term late night, lack of nutritious diet can also lead to dark face. Of course, dark face does have a connection with some diseases, such as some skin melanosis (Rheumatoid arthritis), kidney disease (including adrenal hypoplasia, etc.), liver disease (such as liver cancer, cirrhosis, etc.) may appear dark face. If the dark face is accompanied by other uncomfortable symptoms, it is recommended to go to the hospital in a timely manner to avoid delaying the condition.