Someone with hypothyroidism — an underactive thyroid gland — often experiences some of the following signs and symptoms. Keep in mind that these symptoms alone can't diagnose thyroid disease, and thyroid disease is sometimes present even if you don't experience all the symptoms:
Slow pulse
Enlarged thyroid (unless removed during previous thyroid treatment)
Dry, cool skin that is puffy, pale, and yellowish
Brittle nails and dry, brittle hair that falls out excessively
Swelling, especially of the legs
Hoarseness, slow speech, and a thickened tongue
Slow reflexes
Intolerance to cold
Tiredness and a need to sleep excessively
Constipation
Increased menstrual flow
