A black purple patch around the ear is usually not a kidney problem, and is commonly caused by trauma, post-inflammatory hyperpigmentation or allergic purpura and other diseases.
1. Trauma: If the ear or its surrounding tissues are traumatized and the small subcutaneous blood vessels rupture and bleed, the surrounding skin may appear black and purple, which has nothing to do with the kidneys.
2. Post-inflammatory hyperpigmentation: Post-inflammatory hyperpigmentation is related to disease, environment, trauma and other factors, localized hyperpigmentation spots may appear, mostly dark brown, blue-black or black-purple, etc., which usually do not affect health.
3. allergic purpura: allergic purpura may be caused by infection, immune disorders, heredity, etc., the main symptom is a purple-red papule, mostly on the face, trunk, etc., rarely only one purpura, you can observe whether other parts of the body are also appearing the same black purple, and has nothing to do with the kidneys.
There are many reasons why there is a black purple patch on the side of the ear, it does not mean that there is a kidney problem, if the cause is not clear, we recommend that you consult a doctor for diagnosis, do not listen to rumors.