The management of pain in the lower left side of the thigh needs to be tailored to the cause of the pain and not generalized. Common causes of lower left thigh pain include tissue injury, hip synovial inflammation, pear-shaped muscle syndrome, etc., which can be treated with general therapy and medication. 1. Tissue injury: trauma, strenuous exercise, etc. may cause soft tissue injury on the left side of the thigh, thus causing pain, redness, swelling and other abnormal symptoms. In the acute stage, you can apply ice packs locally, and in the later stage, you can apply heat packs. During the recovery period, try to avoid frequent activities in the affected area, so as not to aggravate the symptoms. You can also take oral medication as prescribed by the doctor, such as Loxoprofen sodium and so on. 2. Hip synovitis: pain in the lower left side of the thigh may be caused by inflammation, such as hip synovitis. During the inflammation, patients need to reduce activities, avoid exertion, and can take medication under the guidance of the doctor, such as etoricoxib tablets, celecoxib capsules, and so on. 3. Piriformis syndrome: this disease is due to the sciatic nerve compression, will cause radiating pain in the lower limbs, buttocks, and may appear the lower left side of the thigh pain. Patients can follow the doctor’s instructions to use nimesulide dispersible tablets, ibuprofen extended-release capsules and other drugs for treatment, can be combined with some physical therapy to promote recovery. Lower left thigh pain may also be caused by other reasons, it is recommended that patients go to the hospital, improve the relevant examination, under the guidance of the doctor for effective treatment.