Does blackness indicate anything?

The rise and fall of qi and blood in the human body is often expressed by the complexion. From the skin color and skin condition of different parts of the face, it can be roughly judged what has happened to the patient's body. Generally, blackness of the complexion belongs to kidney or qi and blood stasis in traditional Chinese medicine. Of course, some people are born with dark skin, which is a normal physiological phenomenon. If the patient's face suddenly turns black, it is recommended to go to the hospital for further examination and treatment.