There are two major types of thyroid disorder – Hypothyroidism and Hyperthyroidism and they have again different subtypes.
Common symptoms of hypothyroidism are weight gain, lethargy, increased sleepiness, hair fall, swelling over face or all over body, menstrual disturbances, infertility means difficulty in conceiving or frequent abortions.
Common symptoms of hyperthyroidism are unexplained weight loss, irritability, insomnia, palpitations, increased sweating, menstrual disturbances.
Investigations and treatment depends on type of thyroid disorder. Thyroid harmone is very important of function of body organ so its level has to be kept under control.