Thyroid disorders are quite common today. This is a medical condition that affects the function of the thyroid gland. It happens when your thyroid gland either produces too much of the thyroxine hormone or too little of it. This hormone is essential for digestion heart and muscle function brain development and maintenance of bones. If you have a deficiency of this hormone you have hypothyroidism. On the other hand if your body is producing too much of this hormone you have hyperthyroidism. Common symptoms of thyroid disorders include fatigue weight gain or loss sensitivity to cold slow or very fast