6. Bowel Disturbances
Both hypothyroidism and hyperthyroidism can cause changes in bowel habits, as both conditions interfere with the body’s ability to digest food and generate waste. People suffering from an underactive thyroid often experience difficulties in passing bowel movements, resulting in chronic constipation. Bowel movements can also be painful and cause additional problems such as hemorrhoids.
For people with hyperthyroidism, bowel movements can become more frequent and more urgent. Diarrhea can also take place. Stools tend to be loose, with higher volumes of liquid and may occur even if the patient has had little to eat.