Small red dots on the calf are painless and itchy, which may be caused by allergic purpura, pigmented purpuric dermatosis or folliculitis, and need to be analyzed according to the symptoms.
1. Anaphylactic purpura: It is a common clinical autoimmune disease, which may be related to drugs, infections and other factors. It can involve capillaries and small arteries all over the body, resulting in intravascular red blood cell exudation, which leads to the appearance of small red dots on the calves of patients without pain or itching.
2. Pigmented purpura dermatosis: it is a disease caused by lymphocyte-mediated red blood cell extravasation, elevated venous pressure and gravity are important triggering factors, and clinically manifested as small red dots on the calves without pain or itching, usually without conscious symptoms.
3. Folliculitis: If the hair follicles are infected by bacteria, fungi and other microorganisms due to poor local hygiene of the legs and excessive sweating, folliculitis will be induced, which will lead to the appearance of small red dots on the calves without pain or itching.
Small red dots on the calves without pain and itching, there may be other reasons, it is recommended that patients go to the regular hospital, clear causes, under the guidance of the doctor for targeted treatment.