... the nodule, your age, and whether the cancer has spread. You and your doctor can work together to develop a treatment plan that meets your needs. 12 Your doctor may refer you to a specialist ... pain, cramps, and diarrhea. Too little thyroid hormone may cause you to gain weight, feel cold and tired, and have dry skin and hair. If you have side eects, tell your doctor. Your doctor ... (1-800- 422 - 6 23 7). Or, chat using LiveHelp, NCI’s instant messaging service, at http://www.cancer.gov/livehelp. You may want to talk with your doctor about taking part in a clinical trial. Clinical...