If a patient has numbness in the back of the right foot, the causes include lumbar disc herniation, dorsalis pedis fasciitis, common peroneal nerve injury, etc., as follows: 1, lumbar disc herniation: seen in patients with lumbar disc herniation, after the right nerve compression, the patient will have numbness in the back of the right foot. 2, dorsalis pedis fasciitis: seen in patients with right dorsalis pedis fasciitis, also prone to numbness in the back of the right foot. 3, common peroneal nerve injury: seen in patients with right lower limb common peroneal nerve injury, also prone to numbness in the right foot. The patient will have numbness in the dorsum of the right foot. After the patient has numbness in the back of the right foot, it is important to consult a doctor to see what causes it, and treat the cause to relieve the symptoms of numbness in the back of the right foot. After the numbness of the back of the right foot, it is important to avoid standing for a long time, squatting, running and jumping, and hiking to avoid aggravating the numbness of the back of the foot. When the symptoms of numbness in the back of the foot are obvious, you can temporarily apply blood circulation drugs, together with nerve nourishing drugs to relieve the symptoms.