Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. No, mastoiditis never causes a shoulder pain. It can cause a referred pain up to neck but not into the shoulder. But if you have osteoma than it can be possible that this osteoma can be present in shoulder. This should be diagnosed by bone scan or by Xrays. Treatment can only be possible once the definitive diagnosis is done. Physiotherapy can play a good role in the condition. Various modalities of physiotherapy like heat therapy, exercise and electrostimulation can help relieving the pain of the shoulder. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.