I have been experiencing muscle spasms in my arms for several months. An ultrasound revealed bursitis in both arms and shoulders, which I thought was the result of over-stretching muscles on a staff health and safety training day (ironic, huh?). However, the symptoms have persisted despite two cortisone shots by my GP, and I have started to recall (as one does) odd health episodes like blurry vision, tiredness and tingling fingers. Actually, the tingling fingers occur on a daily basis.