Left hand inflexibility should be treated according to the cause, common causes are cervical spondylosis, cerebral thrombosis sequelae, rheumatoid arthritis, etc., and the treatments taken are physiotherapy, medication and so on. 1. Cervical spondylosis: prolonged head-down and degenerative changes of cervical vertebrae lead to cervical disc herniation and compression of peripheral nerve roots, causing heavy feeling in the arm and inflexibility in the left hand, which can be treated by massage, anti-inflammatory and analgesic diclofenac sodium delayed-release tablets, and nutritive nerves of methylcobalamin tablets. 2. Cerebral thrombosis sequelae: thrombosis, resulting in ischemia and hypoxia in the motor area controlling the left side of the limb, sensory and motor disorders in the left side of the limb, which can be manifested as hemiparesis of the left side of the limb and inflexibility of the left hand. Hua Tuo Zaizaoyuan can be taken orally to activate blood circulation and eliminate blood stasis. 3. Rheumatoid arthritis: part of the population can be manifested in the left hand joints, pain, pressure, redness, swelling, and activity limitation. Treatment can be used roxithromycin capsules to control inflammation and ibuprofen tablets for pain relief. Left hand inflexibility may have other reasons, such as carpal tunnel syndrome, etc., it is recommended to go to the hospital in a timely manner to identify the cause of the above medication needs to be under the guidance of a doctor.