Numbness of the right side edge of the right foot is considered to be related to lumbar intervertebral disc herniation, fibula fracture, peripheral neuropathy, and localized pressure on the right foot. 1. Herniated lumbar intervertebral disc: the nerves of the right foot are mainly innervated by the sciatic nerve issued from the lumbar region, and when there is a herniated lumbar intervertebral disc, it can press and stimulate the sciatic nerve, resulting in numbness of the right lateral edge of the foot. 2. Fibula fracture: if there is a fracture at the small head of fibula, it will cause damage to the common peroneal nerve, and when the common peroneal nerve is stimulated, there will be numbness of the right lateral side of the foot. 3. Peripheral nerve disease: the most common disease caused by peripheral nerve disease is diabetes mellitus, diabetes mellitus combined with peripheral neuropathy involving the nerve of the right foot will appear numbness. 4. Localized pressure: the numbness of the right foot edge may also be localized pressure, which leads to localized pressure on the nerve to appear numbness of the right foot edge, such as wearing shoes too tight. Numbness on the right edge of the right foot may also have other causes, such as pyriformis syndrome, etc., need to consult a doctor in time, through the doctor’s physical examination, medical history, improve the examination to clarify.