How is hypothyroidism diagnosed?

Diagnosis typically relies on blood tests measuring TSH and free T4. Additional tests may include thyroid antibodies and ultrasound. A clinician interprets results in the context of symptoms and medical history.

Which specialist manages hypothyroidism?

Initial evaluation can be done by primary care or internal medicine; endocrinologists usually manage confirmed cases, complex situations, pregnancy-related care or when expert adjustment is needed.

Does hypothyroidism affect pregnancy?

Thyroid function is important for both mother and fetus. People planning pregnancy or who are pregnant should discuss thyroid testing and follow-up with their healthcare provider, as monitoring may be more frequent.

What lifestyle steps can help alongside medical care?

Balanced diet, regular exercise, adequate sleep and following up with scheduled blood tests help support overall health. Do not self-prescribe supplements—discuss any supplements with your clinician.

Health guide

Hypothyroidism (Thyroid Underactivity) — General Information

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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Endocrinology and Metabolic Diseases

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Specialist referral

Evaluation often begins in primary care; endocrinology referral is recommended for confirmed hypothyroidism, pregnancy-related concerns, pediatric cases or complex management needs.

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Hypothyroidism (Thyroid Underactivity) — General Information

What hypothyroidism is and common causes

Symptoms and risk factors

Diagnosis and which specialists to consult

Daily life, monitoring and general guidance

Urgent signs and what to do

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Questions

Tırnak kırılması ve saç dökülmesi tiroidle ilişkili olabilir mi?

Tiroid ilacını 1 haftadan fazla almamak adet gecikmesine neden olur mu?

No pregnancy for 1 year: high TSH and prolactin

Karın şişliği, kilo artışı ve memede büyüme nedenleri nelerdir?

Yüz kuruluğu, aşırı saç dökülmesi ve çabuk yorulma nedenleri nelerdir?

Hipotiroidizm belirtileri nelerdir?

El ve ayakların sürekli üşümesi dolaşım bozukluğu belirtisi olabilir mi?

Kadınlarda hormonal dengesizlik belirtileri nelerdir?

Hormon bozukluğu belirtileri nelerdir?