9 reasons that cause dark lips, do you know them?

Plump, bright red lips are synonymous with sexiness, but some people's lips may turn black. There are many reasons for black lips, which may be caused by disease or behavioral habits in daily life. So what are the causes of blackening?

Causes of dark lips

1. Lack of vitamin C causes lips to turn dark or have purple-black spots.

2. Abnormal digestive system, poor appetite, constipation, diarrhea, abdominal distension, and black lips will occur.

3. Renal insufficiency can cause pigmentation at the edges of the lips, resulting in dark lips.

4. Lack of oxygen in the blood can also cause black lips.

5. The appearance of black deposits and dark spots may be caused by chronic adrenal insufficiency or polyps in the digestive tract, and there is also the possibility of syphilis.

6. Others: pneumonia, heart failure, diarrhea, constipation, asthma, allergies, poor kidney function, heart disease, diarrhea, etc. may cause black lips.

7. Hepatitis B. Black lips are also one of the symptoms of worsening hepatitis B. When the liver is severely damaged and liver function declines, the body's melanin will increase, resulting in black lips.

If a patient with liver disease has black lips, which is called liver disease face, he or she may also have dry skin, dark or gray complexion. Some patients may also have pigmentation on the face or other exposed parts of the skin. That is, dark eye sockets.

8. Long-term irregular rest will lead to poor blood supply to the body, which will cause black lips.

9. Lack of oxygen, like in a cold winter, if you are exposed to a cold environment for a long time, it will cause cyanosis, but this kind of blackening of lips is only temporary. If the lip cuticle is thick, the lips may also appear dark.