I'm having mussel shoulder pains it feels like it's on fire and i haven't been working out or doing any thing to irritate ?

You need an evaluati: This can be an inflammatory process or a mechanical process. You will need to ask your physician to have you see a rheumatologist. It can be muscle local inflammation a type of locailized myositis, tendonitis, busitis or arthritis to consider a few possible causes.

Rheumatologist: If there is no obvious reason for your bilateral shoulder discomfort, some inflammatory process such as polymyalgia rheumatica, arthritis or bilateral tendonitis must be considered. A rheumatologist is best qualified to evaluate you and order appropriate tests and treatment.