Muscle spasm in hypothyroidism

Muscle spasm is a common symptom when hyperthyroidism is changed to hypothyroidism using Radioiodine I-131 therapy  in first couple of months. Any strenuous exercise can promote strong, persistent contraction of your muscle. The first step is to check your blood for any electrolytes abnormalities in your blood. Usually it will show low level of calcium and you will increase your calcium intake in your food. If symptom do not go away, this spasm may be caused by low levels of potassium in your blood. Increasing high potassium food will solve this problem.