The term hypothyroid means that your thyroid gland is underactive. It can lead to a condition called hypothyroidism in which the thyroid gland does not make enough thyroid hormones. The primary hormones produced by the thyroid gland (thyroxine or T-4, and triiodothyronine or T-3) help to regulate your metabolism. Hypothyroidism can be caused by autoimmune conditions or occur as a reaction to medications you are taking. If you have hypothyroidism you may experience certain signs and symptoms.
Fatigue
As your thyroid gland slows its production of thyroid hormones, your body may first develop general symptoms that you may not attribute to a medical condition, the Mayo Clinic states. This includes fatigue, feeling sluggish, depression and lack of energy. As your metabolism slows, you may also experience unexplained weight loss. While everyone feels tired now and then, extreme or constant fatigue may be a warning sign of an illness.
Pain and Weakness
If your hypothyroidism becomes more severe, you may develop general aches and pains in various muscles and joints. You may feel stiff and weak and your joints can become swollen. The National Endocrine and Metabolic Diseases Information Service claims that you may also become cold easily.
General Symptoms
Hypothyroidism can cause other systems in your body to slow. You may develop constipation, your cholesterol levels may raise, your fingernails and hair may become brittle and your skin may be pale. Your heart rate may become slow or erratic. Your menstrual cycle can become irregular and heavier than normal. If your condition is caused by Hashimoto's disease, you may develop a goiter which can make your voice hoarse and your throat feel full. According to the The Hormone Foundation, if you notice any signs or symptoms of an underactive thyroid, consult your physician. This can be a serious illness if left untreated.
Myxedema Coma
Myxedema coma is a serious complication of hypothyroidism. It occurs when your body's metabolism has slowed to a dangerous level. Your heart rate can slow too much and your body temperature may drop, resulting in hypothermia. If not treated you may become unconscious and this condition can be life threatening.
