Subclavicular pain is mainly considered to be related to inflammation, trauma or tumor growth. 1. Inflammation: If the area below the clavicle is in a cold and wet environment for a long time, it will trigger local inflammation, such as fasciitis, etc. The stimulation of inflammation will easily and directly trigger the symptoms of pain, and you can consider taking non-steroidal anti-inflammatory drugs under the guidance of a doctor, such as celecoxib or meloxicam. 2. Trauma: If the lower part of the clavicle is impacted by external force, which leads to local injury, or the muscle soft tissue is strained due to improper exercise, it is easy to cause pain. Early attention should be paid to the braking and resting, and ice packs should be applied appropriately, and in the later stage, you can choose the treatment of exercise stretching and magnetic heat therapy. 3. Tumor growth: in the area below the collarbone, if there is a local tumor growth such as bone tumor or lung tip tumor, which is easy to cause pain and even accompanied by swelling symptoms, you can consider treatment by tumor resection surgery. There are many reasons for subclavian pain, such as chest wall soft tissue contusion, intercostal neuritis, rib fracture and so on. If subclavian pain occurs, it is recommended to consult a doctor for prompt treatment.