Hypothyroidism is the condition that results when the thyroid gland does not produce enough thyroid hormone. This hormone is a chemical messenger used by the brain to regulate functions in the body including metabolism.

Hypothyroidism symptoms checklist
Because this condition is caused by a shortage of a chemical in the body, hypothyroidism symptoms often come on gradually and may be difficult to notice at first.

Common symptoms include:

Fatigue – feeling tired or unusually sleepy even after a good night’s sleep
Weakness
Depression
Difficulty thinking – it may be harder to concentrate or pay attention, or you may have difficulty remembering things
Weight gain – you may gain weight slowly or have a harder time losing weight even when eating less
Swelling in the legs
Hair changes – hair may feel drier or more coarse, or you may lose more hair than usual
Skin changes – your skin may feel drier or you may look pale. Fingernails may become dry and brittle.
Constipation
Muscle cramps and aches
Cold sensitivity – it may be harder to tolerate cold
Menstrual changes – women may have abnormal monthly cycles for their periods or may have heavier periods

Mild hypothyroidism may not cause any symptoms, or symptoms may be mistaken for other conditions. It is important to note that symptoms can vary dramatically from one person to the next. You may not have all or even most of these symptoms if you have hypothyroidism.

Severe hypothyroidism symptoms
If the condition is left untreated the symptoms of hypothyroidism can become more severe over time. Symptoms that may develop late in the disease include:

• Reduced senses of taste and smell
• Speech difficulties – voice may sound hoarse and speech may become slower
• Puffiness – the skin on the face, hands, and feet can become puffy
• Skin may become thicker
• Eyebrows may become thinner
• Drop in body temperature
• Slow heart beat or heart failure

Hypothyroidism can easily be treated to eliminate these symptoms. If you are concerned about hypothyroidism, talk to your health care provider.

Sources

Medline Plus. Hypothyroidism. Web. December 7, 2011.
http://www.nlm.nih.gov/medlineplus/ency/article/000353.htm

PubMed Health. Hypothyroidism. Web. December 7, 2011.
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001393/

Endocrine Web. Symptoms of Hypothyroidism. Erin Berber, MD & Kelly M. Rehan. Web. December 7, 2011.
http://www.endocrineweb.com/conditions/hypothyroidism/symptoms-hypothyroidism

Medicine Net. Hypothyroidism. Ruchi Mathur, MD, FRCP(C). Web. December 7, 2011.
http://www.medicinenet.com/hypothyroidism/page3.htm#toc5at

Reviewed December 8, 2011
by Michele Blacksberg RN
Edited by Jody Smith