Unfortunately you have not mentioned one crucial information- the duration of your complaints.Also you have failed to mention which group of muscles are involved.
Assuming that it is chronic, and that many muscles are involved, one would like to exclude a couple of possibilities to begin with.
- polymyalgia rheumatica and
There can be many causes for pain in the muscles(myalgia). Some of which are,
- Tension or stress,
- trauma (sprains and strains),
- Overuse of muscles,
- Infectious myositis: HIV, other viruses, fungi, bacteria (including mycobacteria, staphylococcal pyomyositis),
- infestations of the muscle such as trichinosis or disseminated muscular cysticercosis,
- Autoimmune disorders such as polymyositis or dermatomyositis,
- Generalized infections such as Lyme myositis, influenza, malaria, Rocky Mountain spotted fever, polio, leptospirosis, rat bite fever, measles or rheumatic fever
- Drugs including corticosteroids, chloroquine, clofibrate, amphotericin B, carbinoxolone, or hydroxychloroquine.
polymyalgia rheumatica appears less likely as you are younger than 50 years, have no specific location for the pain(neck, shoulder girdle, hip or thighs), no definitive morning stiffness, and no elevation of ESR(frequently elevated).
Firomyalgia has a constellation of symptoms and your symptoms may somewhat fit that description.
Due to lack of sufficient details and lack of opportunity for a physical examination, in such cases, it may not be possible to offer a definitive diagnosis.
You should consult a rheumatologist and have your condition sorted out.
MB BS, MS, FRCS(Edinburgh)