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Hyperthyroidism (Graves' Disease)
Hyperthyroidism means that the thyroid gland is overactive, producing too much thyroid hormone. The excess hormone leads to an overactive metabolism.
Hypothyroidism in Children
Hypothyroidism is the condition in which the thyroid is underactive—producing too little thyroid hormone.
Postpartum thyroiditis is a temporary but fairly common condition that results in either an overactive or underactive thyroid.