In this Article

• What is hypothyroidism?
• What are the thyroid hormones?
• Thyroid hormone regulation - the chain of command
• What causes hypothyroidism?
• What are the symptoms of hypothyroidism?
• How is hypothyroidism diagnosed?
• How is hypothyroidism treated?
• What is subclinical hypothyroidism?
• What's best for you?
• Hypothyroidism At A Glance
• Hyperthyroidism - Slideshow
• Patient Discussions: Hypothyroidism - Symptoms Experienced
• Hypothyroidism Glossary
• Hypothyroidism Index

What are the symptoms of hypothyroidism?

The symptoms of hypothyroidism are often subtle. They are not specific (which means they can mimic the symptoms of many other conditions) and are often attributed to aging. Patients with mild hypothyroidism may have no signs or symptoms. The symptoms generally become more obvious as the condition worsens and the majority of these complaints are related to a metabolic slowing of the body. Common symptoms are listed below:

• Fatigue
  
  
• Depression
  
  
• Modest weight gain
  
  
• Cold intolerance
  
  
• Excessive sleepiness
  
  
• Dry, coarse hair
  
  
• Constipation
  
  
• Dry skin
  
  
• Muscle cramps
  
  
• Increased cholesterol levels
  
  
• Decreased concentration
  
  
• Vague aches and pains
  
  
• Swelling of the legs

As the disease becomes more severe, there may be puffiness around the eyes, a slowing of the heart rate, a drop in body temperature, and heart failure. In its most profound form, severe hypothyroidism may lead to a life-threatening coma (myxedema coma)). In a severely hypothyroid individual, a myxedema coma tends to be triggered by severe illness, surgery, stress, or traumatic injury. This condition requires hospitalization and immediate treatment with thyroid hormones given by injection.

Properly diagnosed, hypothyroidism can be easily and completely treated with thyroid hormone replacement. On the other hand, untreated hypothyroidism can lead to an enlarged heart (cardiomyopathy), worsening heart failure, and an accumulation of fluid around the lungs (pleural effusion).

Hypothyroidism - Symptoms Experienced

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