The causes of feeling cold on the outside of the right calf may include lumbar disc herniation, stenosing vasculitis, localized fasciitis, etc. Patients should choose the appropriate care and treatment according to the different causes of the disease in order to avoid delaying the condition. 1. Herniated lumbar intervertebral disc: the herniated intervertebral disc will compress the nerve root, causing abnormal sensation of the nerve endings and symptoms of coldness, numbness or pain on the outer side of the calf. Patients can be clearly diagnosed through lumbar spine front and side view film, lumbar spine nuclear magnetic resonance and so on. 2. Stenosing vasculitis: The phenomenon of cold calves is caused by poor local blood circulation due to occlusion or narrowing of arterial blood vessels. Symptoms can be relieved by massage, foot soak and acupuncture on the waist and legs. 3. Local fasciitis: chronic aseptic inflammation caused by local soft tissue strain, resulting in local fasciitis, resulting in symptoms of cold calves. There may also be other reasons, please consult the hospital in time to avoid delay.