Bruised patches on the calf may be allergic purpura, cyanotic vasculopathy, erythema nodosum and other diseases.
1. Allergic purpura: this disease is more complicated, viral infection, bacterial infection, etc. will lead to a pathological reaction of antibodies in the body, causing metamorphic reaction small blood vessel inflammation, resulting in skin purpura, the main manifestation of which is a pinpoint-sized or soybean-sized purpura accompanied by petechiae.
2. Cyanotic vasculopathy: this is a kind of disease related to thrombosis, the specific cause of the disease is not clear, there will be double calves, ankles around the skin of chronic painful penetrating ulcers can be accompanied by reticular cyanotic or purpura.
3. Erythema nodosum: this is a kind of inflammatory skin disease that occurs in the subcutaneous fat lobule interval, there will be painful plaques in the calf area, the plaques begin to be red nodules with the rise of skin temperature will become cyanotic.
Calf bruise plaque is a symptom, can not be directly diagnosed, should go to the hospital in time to do the examination, according to the results of the examination and clinical symptoms of comprehensive diagnosis, standardized treatment in accordance with medical advice.