Hypothyroidism

Hypothyroidism is a medical condition. If a person has hypothyroidism, their thyroid gland does not make enough hormones. This condition is also called underactive thyroid.^[1] It can be caused by many factors, but it is more common when a person has insufficient iodine. Severe hypothyroidism in infants can result in cretinism. Symptoms of hypothyroidism include the following: tiredness, headaches, weight gain, dry skin, constipation, and poor concentration.

Symptoms and signs of hypothyroidism.

Symptoms	Signs
Fatigue	Dry, coarse skin
Feeling cold	Cool extremities
Poor memory and concentration	Myxedema (mucopolysaccharide deposits in the skin)
Constipation	Hair loss
Weight gain with poor appetite	Slow pulse rate
Shortness of breath	Swelling of the limbs
Hoarse voice	Delayed relaxation of tendon reflexes
Heavy periods (and later light periods)	Carpal tunnel syndrome
Abnormal sensation	Pleural effusion, ascites, pericardial effusion
Poor hearing

Eye bags
(periorbital bilateral edema)
Can be a sign of different medical disorders including hypothyroidism.

Hypothyroidism
Classification and external resources
Hypothroidism is when the thyroid gland does not make enough thyroid hormone.
ICD-10	E03.9
ICD-9	244.9
DiseasesDB	6558
MedlinePlus	000353
eMedicine	med/1145
MeSH	D007037