I have had a sudden very sharp pain in the high calf almost to the bend in the knee. I have not done anything to cause it. I have fibro, and asteo arthritus. This is new and has brought me to the ground twice, and now while sitting. I have just ate some sunflower seeds to up my potsm. Think it could be a nerve. It is not a cramp.Thoughts?
You may have a mild to moderately strained gastrocnemius muscle.  Potassium is not going to be an issue.  Certainly, HY Chat Doctor.  Ever really work.  These kinds of pains can come in people not suffering from any imbalances metabolically in anything.  As I said, if calcium or potassium were a problem to the extent that the calf muscle suddenly had a spasmodic pain radiating to the knee then, the expectation would be many more muscles would be involved.  This sounds to be musculoskeletal, circulatory, or something unknowingly post-traumatic in terms of either a blunt or a stretch injury of a tendon, ligament, or muscle belly tear which can occur in folks with very severe OSTEOARTHRITIS- not so sure that your FM is playing a role due to the location. Send more questions to www.bit.ly/