Why is the color of nails purple?

When the weather is cold, fingers have just been taken out of cold water, or wearing too few clothes, and the supply of body heat source is insufficient, which leads to vasoconstriction, poor peripheral circulation, purple fingers and purple nails. Keep warm, just keep warm.

2. Insufficient blood supply

Insufficient blood supply to the human body will cause partial hypoxia of the fingers, and the color of the fingers will gradually deepen and become purple-black; However, people with poor blood gas and anemia symptoms will also change the color of their fingernails, with different shades of color and purple.

Step 3 cyanosis

In addition to purple nails, if the lips are purple, this phenomenon is medically called cyanosis and cyanosis; If the reduced hemoglobin in the blood in the superficial microvessels increases, the skin and mucosa will be blue and purple, which is the performance of human hypoxia. Many diseases can cause cyanosis, such as respiratory diseases, cardiovascular diseases, blood system diseases and so on.

4. Signs of heart disease

Nails are purple, which is a sign of heart disease and hematological diseases, suggesting hypoxia or some abnormal components in the blood. If purple and light colors appear alternately, it can be seen in limb spasm.