Hi, Noted your history of fractured clavicle also called as collarbone, sneezing increased the pain and part of the bone fragment is protruded. The standard treatment is reduction and fixation of any fracture for that sake, the same applies for fracture of clavicle too. o first of all consult a proper Orthopedic Surgeon for clinical evaluation, examination and X-rays; get the fracture fixed as per his advise and your problem of pain will solve. Surely a an anti-inflammatory with painkiller will be advised which you should take. If sneezing or coughing is the problem get this symptomatically treated too. Take rest, helps in healing. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon