Muscle spasms are certainly a side symptom of OA and RA for a variety of reasons. A nutritional imbalance could be the culprit, or dehydration. Also, when your neck hurts, for example, your muscles
unconsciously tense up to "protect" the sore
area. The constant stress causes the muscles
to become tired, sore
and actually inflamed. Cramping, spasms and nerve compression can result.