(HealthDay News) -- The thyroid gland, found in the front of the neck just below the voicebox, produces a vital hormone that helps control your body's metabolism. When it doesn't produce enough of this hormone, the condition is called hypothyroidism.

The U.S. National Library of Medicine says the following symptoms may indicate hypothyroidism:

• Greater sensitivity to cold.
• Constipation.
• Depression, feeling weak or fatigued.
• Pain in the joints and muscles.
• Above-normal bleeding during menstruation.
• Unexplained weight gain.
• Dry or pale skin.
• Thin, brittle hair and nails.