Sudden bulging of the left clavicle may be caused by trauma, swollen lymph nodes near the left clavicle, and so on.
1. Traumatic factors: this is the most common cause of local swelling, such as trauma triggered clavicle fracture, acromioclavicular joint dislocation, due to trauma triggered by local bleeding and soft tissue edema may occur in the affected area of the swelling and pain.
2. Enlarged lymph nodes: the supraclavicular fossa is the area of lymph node palpation, if the lymph nodes are enlarged, the enlarged lymph nodes can be palpated in the supraclavicular fossa in this position, most of them are caused by the inflammatory reaction in the vicinity, inflammation of lymph nodes, blood diseases, and so on, and the seriousness of the problem may be seen at the affected side of the clavicle to be elevated.
Sudden protrusion of the left clavicle can also be seen as a cause, and it is recommended that prompt medical attention is needed for examination and treatment under the guidance of a doctor.