Thyroid Problems: Symptoms, Tests, Hypothyroidism & Hyperthyroidism

Learn common thyroid symptoms, hypothyroidism, hyperthyroidism, TSH testing and when thyroid evaluation may be needed.

What Does the Thyroid Gland Do?

The thyroid gland produces hormones that influence metabolism and several body functions.

Two commonly discussed thyroid conditions are hypothyroidism and hyperthyroidism.

Hypothyroidism

Possible symptoms include:

• Fatigue
• Feeling unusually cold
• Constipation
• Dry skin
• Weight gain
• Slow heart rate
• Difficulty concentrating

Hyperthyroidism

Possible symptoms include:

• Weight loss
• Palpitations
• Increased sweating
• Tremor
• Anxiety
• Heat intolerance
• Frequent bowel movements

These symptoms can also occur in many other conditions.

What is TSH?

TSH, or thyroid-stimulating hormone, is commonly used in thyroid evaluation.

Depending on the situation, doctors may also order free T4, free T3 or thyroid antibody testing.

Don’t treat the laboratory number alone

Thyroid test results should be interpreted along with symptoms, examination, medications, pregnancy status where applicable and other clinical factors.