There are black lines on the nails. What happened?

There are obvious vertical stripes on the nail deck, which is a symbol of long-term neurasthenia and physical aging, and it is easy to appear:

First, neurasthenia, long-term insomnia, dreaminess, easy to wake up, difficult to sleep.

Second, wasting diseases, physical exhaustion (such as physical and mental fatigue syndrome)

Third, poor immune function, easy to catch a cold, more likely to catch a cold.

Fourth, if the longitudinal stripes are particularly obvious, they are often pathological longitudinal stripes, indicating that the body has suffered too many diseases.

5. Pay special attention when black vertical stripes appear. This is a sign of weak liver and kidney function and accumulation of toxins. Liver and kidney function has the detoxification function of excreting waste in the body. When the liver and kidney function is weak, the waste in the body cannot be excreted. Black vertical stripes are often formed on the deck because of contact with tumor patients who pollute the environment, pollute the diet and have too many pesticides and heavy metals in food, and after excessive accumulation of drug toxins such as chemotherapy or a severe gastroenteritis and diarrhea.