The pain of walking after foot sprain is mainly due to the following reasons: 1, due to the tearing of ligaments after sprain, or tearing of joint capsule, muscle strain, local bruising, bruising stimulates the peripheral nerves and can cause pain. 2, when walking, ankle dorsiflexion, plantar flexion, inversion and valgus, pulling and tearing ligaments and joint capsule can also cause pain. 3, if the ligaments are not repaired before walking too early, it will lead to tearing ligaments If the sprain is not treated with warmth in time, the patient will feel the wind, cold and dampness, and the local wind, cold and dampness will accumulate and paralyze the meridians, which will cause pain.