The thyroid gland plays a substantial role in regulating metabolism of the body. That is to say, a failing thyroid gland can give you the headaches related to weight gain or loss, irregular periods, skin dryness, dry hair, chronic fatigue, constipation, diarrhea, etc. The most common thyroid diseases are hypothyroidism (underactive thyroid), hyperthyroidism (overactive thyroid) and enlarged thyroid. The worst thing about thyroid problems is that their symptoms overlap with those of other diseases and even with each other. Thyroid disorders can be tackled effectively with the help of herbs once you know which type you are suffering from in a sureshot manner. Here is a list of the best herbs for thyroid problems. Do consult your doctor prior to including any of these herbs as they may have side effects.