1, the reason why nails appear black lines is the influence of some liver and kidney diseases. As we know, the liver and kidney play an important role in human excretion and detoxification. Problems in these parts will directly affect the detoxification of the body, leading to the accumulation of some heavy metals and black lines on nails.
2. The black line on the nail may also be some tumor diseases, as well as diseases caused by environmental and food pollution, which may be caused by chemotherapy and eating some toxic food by mistake, and may also be reflected.
3. There are black lines on the nails. Some people have this symptom because they are in a state of high tension or emotional instability for a long time.
4. Black lines appear on nails, which may also be caused by trauma, fungal infection and some drugs.
Precautions:
1, in order to protect nails, try to stay away from radioactive products at ordinary times.
2. Healthy nails should be red or pink. Abnormal color changes in a short time may indicate disease.