Conditions affecting thyroid hormone production. Review possible symptoms, contributing factors, assessment, warning signs and care options.
About Thyroid Disorders
Conditions affecting thyroid hormone production
Thyroid disorders include hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid).
The thyroid gland regulates metabolism, energy, and many other body functions.
Editorial update (28 September 2026): structured medical content awaits clinical reviewer sign-off.
How assessment may be approached
Assessment may include symptom duration, weight or temperature changes, thirst or urination, menstrual or reproductive history, medicines and family history. Blood tests and review of previous reports may be needed.
Care may include monitoring, treatment of a hormonal imbalance, medicines or review by an endocrinologist. Ask how results link to symptoms and when follow-up testing is appropriate.
When to seek prompt care
Seek urgent care for confusion, severe weakness, vomiting or dehydration with diabetes, fainting, severe palpitations, breathing difficulty, very high or very low glucose where measurable, or sudden severe symptoms.
Symptoms
- Hypothyroidism: fatigue, weight gain, cold sensitivity
- Hyperthyroidism: weight loss, rapid heartbeat, anxiety
- Hair loss
- Menstrual changes
Possible causes
- Autoimmune disease
- Radiation therapy
- Medications
- Pregnancy
- Iodine deficiency or excess
Care and treatment options
- Thyroid hormone replacement (hypothyroidism)
- Anti-thyroid medications (hyperthyroidism)
- Radioactive iodine
- Thyroid surgery
- Beta blockers
Key points
- Affects 20 million Americans
- More common in women
- Often undiagnosed
- Treatable with medication
Preparing for a consultation
- Recent laboratory results and medicine or supplement list.
- Weight, appetite, temperature tolerance and menstrual changes.
- Blood glucose readings if you monitor them.
- Family history and how symptoms affect daily life.
Questions worth asking
- Is Thyroid Disorders the most likely explanation for these symptoms, and what alternatives should be checked?
- Which symptoms or findings would require urgent review?
- Are medicines, underlying health problems or lifestyle factors contributing?
- What tests or examinations are needed now, and what can safely wait?
- What treatment or self-care options are reasonable, and when should I be reviewed again?
- What is the expected benefit, limit, cost and follow-up plan for the suggested care?
Related clinicians
Medical information limitations
This page summarizes listed condition information and cannot confirm a diagnosis or choose treatment. Do not start, stop or change prescribed treatment based only on this page.
Common questions
What is Thyroid Disorders?
Conditions affecting thyroid hormone production This is general information; the name describes a possible diagnosis or clinical problem, not a personal diagnosis.
How might a clinician assess Thyroid Disorders?
Assessment may include symptom duration, weight or temperature changes, thirst or urination, menstrual or reproductive history, medicines and family history. Blood tests and review of previous reports may be needed.
What care may be discussed?
Care options listed include Thyroid hormone replacement (hypothyroidism), Anti-thyroid medications (hyperthyroidism), Radioactive iodine, Thyroid surgery. Which option is appropriate depends on the confirmed cause, severity, preferences and contraindications.
When should Thyroid Disorders be checked urgently?
Seek urgent care for confusion, severe weakness, vomiting or dehydration with diabetes, fainting, severe palpitations, breathing difficulty, very high or very low glucose where measurable, or sudden severe symptoms.
How should I prepare for a consultation?
Recent laboratory results and medicine or supplement list. Weight, appetite, temperature tolerance and menstrual changes. Blood glucose readings if you monitor them. Family history and how symptoms affect daily life. Bring previous reports and a current medicine list where relevant.
Can this page diagnose or treat the condition?
No. A page about Thyroid Disorders can help you understand possible features and questions, but it cannot confirm a diagnosis or choose treatment. A qualified clinician should assess your symptoms, history and any test results.
General information only; it is not a diagnosis or a substitute for a qualified clinician’s advice.