I was diagnosed with fibro 6 years ago. I take Ultracet two or three times a day which seems to help control my pain, however, in addition to the muscle tenderness I also keep having bouts of tendinitis. First it was tennis elbow, then trigger thumb. Now my trigger thumb is back, and I have tendinitis in both Achilles tendons. Is this just another manifestation of fibro? Does anyone else suffer from generalized tendinitis?