The purple color of fingernail cover may be caused by trauma, certain hypoxic diseases, autoimmune diseases and other reasons.
1. trauma: trauma is one of the common causes of purple fingernails, because fingernails are easily hit or squeezed, which leads to bruises in the nails, dark purple.
2. Certain hypoxic diseases: such as chronic obstructive pulmonary disease, congenital heart disease, etc., due to impaired cardiopulmonary function, there is a lack of oxygen in the body and cause purple fingernails, sometimes for the phenomenon of black, if the patient’s lips or toenails are also cyanosis, it is a manifestation of hypoxia.
3. Autoimmune diseases: such as Raynaud’s syndrome, mainly caused by arterial spasm peripheral circulation disorders, usually in the onset of the performance of the finger cover or the whole finger purple, black, and ischemic arterial spasm.
Hand nail cover purple may also be caused by other diseases, it is recommended that patients go to the hospital in a timely manner, by the doctor to give standardized treatment after a clear diagnosis, so as not to delay the condition.