The painful protrusion of the right side of the clavicle may be due to the following reasons: 1. There may be a clavicle-related injury, which is often seen in patients during strenuous activities or in car accidents when the shoulder is hit, which may cause a fracture or dislocation of the clavicle. This may be caused by a fracture or dislocation of the clavicle. 2. It may be caused by an occupational disease, such as a bone tumor in the clavicle or other parts of the shoulder. 3. 4. It may also be caused by inflammation of the joints around the clavicle, such as in the acromioclavicular joint or the sternoclavicular joint, due to traumatic infection and other factors that may cause inflammation of the joint.