Understanding Thyroid Problems: 15 Warning Signs

8. Unpredictable bowel function

Many patients with thyroid disease complain of unpredictable and dysfunctional bowel habits. Hypothyroidism is often linked to constipation because the slowing of the metabolism also diminishes the movement of food through the digestive tract. This results in compromised gut motility, which makes it difficult to achieve a bowel movement. With hyperthyroidism, conversely, overactive metabolism may lead to very quick passage of food through the gut, thus preventing water reabsorption and the formation of a firm, well-formed stool, and resulting in diarrhea or more frequent bowel movements. The urge to visit the bathroom is particularly strong after eating. Over-the-counter medications for these symptoms can provide temporary relief.