Hypothyroidism is a condition in which your thyroid makes too little of the hormone thyroxine. The Merck Manuals report that the overall results of hypothyroidism is a slowing down of the vital bodily functions. According to All Thyroid, an estimated 10 million Americans are affected by hypothyroidism, but an estimated 8 million do not know they have it.
Psychological Effects
Some of the effects of hypothyroidism are psychological in nature and can be confused with other psychological conditions. For example, MedlinePlus reports that depression, fatigue and an overall sluggishness are common symptoms of hypothyroidism. The Merck Manuals indicate that a hypoactive thyroid may also cause confusion, forgetfulness and dementia, especially in the elderly. These symptoms may be confused with Alzheimer's disease or another form of dementia. The elderly are particularly at risk for hypothyroidism: All Thyroid reports that hypothyroidism is especially common in women over 50 and men over 60. The organization encourages people of all ages to consult a doctor if any of these symptoms are experienced.
Hair, Nail and Skin Symptoms
MedlinePlus reports that hypothyroidism can cause changes in hair, fingernails, toenails and skin. Hypothyroidism causes the fingernails to become thin and brittle, and the skin may become dry or appear pale. According to All Thyroid, the fingernails are also grow slower than normal. In the late stages of hypothyroidism (meaning the thyroid has been producing too little thyroxine for an extended length of time), the skin becomes thick and the eyebrows become thin.
Other Symptoms
Because thyroxine affects so many parts of the body, a deficiency in this hormone has wide-ranging physiological effects. These effects include heavier menstrual periods in women, joint and/or muscle pain, weakness and unintentional weight gain. The Merck Manuals confirm these symptoms and add that hypothyroidism can cause the voice to become hoarse and speech to become slow. Other possible symptoms include drooping eyelids, dull facial expressions, and puffy eyes and face. People with hypothyroidism may also have decreased tolerance of cold and may develop carpal tunnel syndrome in the hands, causing them to hurt and/or tingle.
