 [ Symptoms ] can sinus infection cause firbromyalgia pain to flair  i have pain in my back near shoulder blade x rays show clear lungs but do show arthritis problems [ Disease ] i do not know i can not see them examine you nor do i know anything about you or your medical history there is no way for me or any medical provider to be able to blindly guess that nature of your sores based on vague description if you would like to have a definitive answer a diagnosis after a year and a half of worry then i strongly suggest that you see an ent specialist for a high level examination