Calf a bruise hard edema is very painful, mainly trauma caused by local soft tissue contusion and primary or allergic purpura lesions caused. 1. caused by trauma: such as local collision or bruises or sprains, etc., localized pressure pain, accompanied by swelling, around the soft tissue bruises. Early need ice braking treatment, at the same time elevate the affected limb, pay attention to rest, avoid weight bearing on the affected limb, etc., and later can use hot compresses and other physical methods of treatment. 2. primary or allergic purpura: hematological examination can be a clear diagnosis, often accompanied by bleeding gums and nose, as well as hematuria and proteinuria, etc., some patients will appear abdominal pain and discomfort and black stools. A bruise on the calf is hard and edematous and painful, and it is necessary to go to the hospital in time to clarify the cause of the disease, and to treat the cause of the disease.