By hypothyroidism, the thyroid gland is producing too less hormones to stimulate the metabolism or the body is not able to utilize the hormones. The lack of thyroid hormones slows down the metabolism and thus all the activities in the body, giving a combination of many symptoms related to slowness of bodily processes.
Hypothyroidism is common, but the frequency of the condition is not well determined. Some authorities estimate that 0.5% of the total American population have the disease to some degree. The frequency is much greater among people over 50 years of age than among young people.
THE SYMPTOMS AND COMPLICATIONS OF HYPOTHYROIDISM
The most common early symptoms are: Mental and physical fatigue, weakness, weight gain or over-weight, and depression.
One or more of these symptoms also use to appear early: Constipation, sensitivity to coldness, cold hands and feet, thick tongue, decreased sweating, dry hair, thin brittle hair, thin brittle nails, muscle and joint pain, pale or yellowish skin.
One or more of these symptoms usually appear later: Poor memory, slow thought process, drowsiness, slow speech, thinning of eyebrows, hoarseness,...