Under normal circumstances, the fingernails are pink and the surface is very smooth. However, in daily life, some people encounter purple fingernails. If the symptoms are serious, they will look scary. I am very worried about whether I have a serious illness. So what happened to the purple fingernails?

　　One, Trauma
　　 Trauma is one of the common causes of purple fingernails. For example, many people are engaged in work that requires hands-on work. In the process of work, fingernails are easily affected by impact or Squeeze, which leads to congestion in the nail, which is purple-red on the nail cover.
　　Second, insufficient blood supply
　　If the human body lacks blood supply, it may cause partial hypoxia of the fingers. If the fingers are hypoxic, the color of the fingernails will gradually darken At first, it turned purple. If the situation worsened, it would even turn black, and generally ten fingers would show the same symptoms.

　　Three, anemia
　　If a person''s blood is not strong and often anemia, it may also cause the fingernails to become purple. However, due to the different levels of anemia in each person, the shades of purple fingernails are also different, the more purple the color, the worse the condition.
　　Four, the weather is cold, the temperature is too low
　　 If the weather is cold, the temperature is very low, and you don’t wear much clothes when you go out, it is easy to cause blood vessels to contract and nerves The circulation of the tip will also become very slow. At this time, the fingernails will also become purple. This situation is very common. As long as the nails are taken, the color of the nails will return to normal.

　　Five Heart disease
　　Purple fingernails may also be caused by certain heart diseases, because purple nails are related to the blood supply. If the blood supply is insufficient, it will affect the heart health. So people with heart disease are also prone to purple nails.
　　Six. Rheumatoid immune diseases
　　If the patient’s fingernails appear purple for a long time, then it is likely to be suffering from rheumatic immune diseases. As long as the fingers of such patients come into contact with cold water or the fingers are cold, the nails will turn purple immediately and will recover after a while.