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    Hypothyroidism happens when your thyroid gland doesn't make enough thyroid hormone. Thyroid hormone controls the way your body uses energy. A low thyroid level can make you feel tired and weak.

    Medicine can correct your thyroid level. Most people need to keep taking the thyroid medicine throughout their lives.

    Current as of: November 20, 2015

    Author: Healthwise Staff

    Medical Review: Kathleen Romito, MD - Family Medicine & Matthew I. Kim, MD - Endocrinology

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