Purple nails may be caused by environmental factors, trauma, anemia, nail fungus and other factors.
1. Environmental factors: the weather is too cold, wearing too little clothing, may lead to terminal finger ischemia and hypoxia, the phenomenon of purple nails will occur, after improving the surrounding environment, can gradually return to normal.
2. Trauma: for example, excessive extrusion, smashing, resulting in bruising under the nail, the nail will appear purple, may also be accompanied by pain, bleeding and other symptoms.
3. Anemia: for example, iron deficiency anemia, resulting in low hemoglobin and poor blood oxygen capacity, which will lead to purple nail cover, may also be accompanied by weakness, pallor, dizziness and other symptoms.
4. ringworm of the nails: related to fungal infections, the nails for a long time by inflammatory substances stimulation, will lead to the nail cover becomes purple gray or gray, and in severe cases will lead to nail detachment.
Nail cover purple, and the existence of other abnormal symptoms, it is recommended to go to the regular hospital dermatology department for diagnosis and treatment. The use of medication should follow the doctor’s instructions.