Hypothyroidism occurs when the thyroid gland produces insufficient thyroid hormones. This page outlines common features, symptoms that commonly prompt assessment, typical diagnostic steps, and which medical specialists may be involved. For personalized diagnosis or management, consult a healthcare professional.
What hypothyroidism is and common causes
The thyroid gland, located at the front of the neck, secretes hormones that influence metabolism, energy use, temperature regulation and other body functions. Hypothyroidism means reduced production of these hormones. Common causes include autoimmune thyroid disease (for example, Hashimoto’s thyroiditis), previous thyroid surgery or radioactive iodine therapy, certain medications, and less commonly dysfunction of the pituitary or hypothalamus. Congenital (born-with) hypothyroidism is a distinct category.
Symptoms and risk factors
Symptoms often develop slowly and vary between individuals. Typical complaints include persistent fatigue, unexplained weight gain, increased sensitivity to cold, constipation, dry skin, hair thinning, muscle weakness and difficulties with memory or concentration. Menstrual irregularities and reduced fertility can occur. Hypothyroidism is more common in women, older adults and people with a personal or family history of autoimmune conditions.
Diagnosis and which specialists to consult
Diagnosis is usually made with blood tests measuring TSH and free T4 levels. Tests for thyroid-specific antibodies and thyroid ultrasound or additional hormone tests may be used when indicated. Initial assessment can be performed in primary care or internal medicine; patients are referred to an Endocrinology specialist when diagnosis is confirmed, management is complex, or pregnancy/pediatric issues arise. Discuss testing frequency and interpretation with your clinician.
Daily life, monitoring and general guidance
Regular follow-up is important to monitor hormone levels and symptoms. Routine blood testing helps adjust management over time. General measures that support health include balanced nutrition, regular physical activity and sufficient sleep. Avoid starting supplements or herbal remedies without medical advice. If you have other chronic conditions, coordinated care with relevant specialists improves overall management.
Urgent signs and what to do
Severe or rare presentations (for example, marked confusion, significant breathing difficulties, very slow heart rate or profound hypothermia) require immediate medical attention. If such serious symptoms occur, seek emergency medical services or go to an emergency department. This page provides general information and is not a substitute for urgent care when needed.
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