Eyelids and lips are dark for a number of reasons, such as lack of sleep, heart disease, lack of oxygen, chronic diseases of the body and so on. 1. Lack of sleep: poor sleep quality, lack of sleep, mental labor may cause eyelids and lips are black phenomenon. 2. Heart disease: for example, congenital heart disease or various causes of myocardial blood supply is insufficient, the heart ejection volume is reduced, may affect blood circulation, resulting in eyelids and lips are black. 3. Lack of oxygen: lack of oxygen in the body caused by various reasons can easily lead to insufficient blood and oxygen supply, resulting in dark eyelids and lips. 4. Chronic diseases: such as severe hepatitis, renal insufficiency, uremia, etc. may also cause eyelids and lips are black. Eyelids and lips are black, there may be other reasons, need to go to the hospital in time to check, clear cause, active treatment.