8. Dry skin: Skin can feel itchy, thanks to a slowed metabolism from hypothyroidism that reduces sweating. Because the skin lacks enough moisture, it becomes dry and flaky. Also, the fingernails become brittle and form ridges.
9. Unpredictable bowels: Hypothyroidism can lead to constipation as a result of digestive processes slowing down. “There’s no motility in your gut,” says Robin Miller, M.D. “This is one of the top three most common symptoms of hypothyroidism I see.”
An overactive thyroid acts the opposite way, causing diarrhea and more frequent bowel movements.
10. Changes in menstrual periods. Perhaps you experience longer periods with a heavier flow and more cramps, or your periods are closer together. The reason may be hypothyroidism. Hyperthyroidism may result in shorter, lighter and farther-apart periods.
11. Painful extremities or muscles: Mysterious or sudden tingling in the arms, legs, feet or hands could signal hypothyroidism. The condition can damage nerves that send signals from the brain and spinal cord throughout the body.
12. High blood pressure: Too much or too little thyroid hormone can cause this condition. Low amounts can slow the heartbeat, which affects the pumping and strength of the blood vessel wall.
13. The body’s thermostat is out of whack: An underactive thyroid may result in making you feel cold and chilly because the cells the cells burn less energy, and therefore produce less heat. An overactive thyroid makes a person feel too warm and cause profuse sweating.
14. Hoarseness or the neck feels funny: Determine if your thyroid is swelling. Watch in a mirror as you swallow a drink of water. If you see anything lumpy or suspicious, visit the doctor.