The method of applying artificial or natural physical factors to the body to prevent and treat diseases is called physical therapy, or physiotherapy for short. Physiotherapy is widely used in clinical practice and has important practical value in treating and preventing diseases and restoring functions, often playing a role that other therapies cannot. In the treatment of lumbar disc herniation, it can also play an important auxiliary role. (1) Analgesic effect. Pain is one of the main symptoms of lumbar disc herniation, manifested as lumbar pain radiating unilaterally or bilaterally to the lower limbs. Various heat therapy and electrical stimulation therapy in physical therapy can relieve pain and can play a role in symptomatic treatment. (2) Anti-inflammatory effect. In patients with lumbar disc herniation, local inflammatory reactions often occur due to rupture of the fibrous ring or compression of the nerve root by the herniation. Heat therapy, short wave, ultra-short wave, infrared and other physiotherapy means have the effect of promoting the inflammation to subside and absorb. (3) The effect of loosening adhesions and softening the scar. Physiotherapy can loosen adhesions caused by various reasons, especially for the recovery of patients with lumbar disc herniation who have received surgical treatment. (4) The effect of excitation of nerves and muscles. Untimely treatment of lumbar disc herniation can cause numbness and muscle atrophy in the lower limbs due to prolonged nerve root compression. Low and medium frequency electrotherapy can stimulate the excitation nerve to repair and regenerate, or make electric gymnastics to make muscle excitement contraction, can also promote sensory recovery.