Thoracic outlet syndrome causing intractable left chest pain can be treated by physical therapy, medication and surgery. 1. Physiotherapy: Enhancing the strength of peri-shoulder muscles through postural exercises and reducing the pressure on the neurovascular vessels at the left thoracic outlet can relieve the symptoms of left chest pain. 2. Drug treatment: anti-inflammatory painkillers such as ibuprofen and naproxen can be applied under the guidance of doctors; closed treatment can also be applied to alleviate the symptoms by injecting anesthetics, hormones or botulinum toxin into the trapezius muscle. 3. Surgical treatment: For those who are not obvious with the effect of physical therapy, surgical treatment should be taken, such as removing the first rib, which can relieve the symptoms of left chest pain. It is recommended that people with intractable left chest pain caused by thoracic outlet syndrome should go to the hospital in time for a clear diagnosis and standardized treatment under the guidance of the doctor, so as to avoid adverse effects on the body due to the delayed condition.