TSH influences thyroid hormones that control heart rate, metabolism, sleep, and mood. High TSH levels usually mean the thyroid is underactive, which is called hypothyroidism. Low TSH levels suggest an ...

Medically reviewed by Danielle Weiss, MD Low TSH levels may suggest hyperthyroidism, which causes symptoms like weight loss and increased appetite.High TSH levels can be a sign of hypothyroidism, with ...

Hyperthyroidism affects TSH levels, causing them to fall below expected ranges. Hyperthyroidism can occur when the thyroid gland in the neck produces too much thyroid hormones, including ...

If you're like most primary care clinicians, your email inbox is flooded with messages from patients with questions about lab results. A common query: Should I be worried about an abnormal value on a ...

Overtreatment for hypothyroidism causes levels of thyroid-stimulating hormone (TSH) to drop too low, which can lead to hyperthyroidism. Hypothyroidism is an underactive thyroid. This means the thyroid ...

Postprocedural hypothyroidism occurs when the thyroid doesn’t produce enough thyroid hormones as a result of a medical procedure, like surgery to remove all or part of the thyroid gland.