Hypothyroidism
A condition where the thyroid produces insufficient hormones, affecting metabolism and energy. It is treated with daily hormone replacement medication.
Key facts at a glance
- ICD-10
- E03.9
- ICD-11
- 5A00.0
- Body system
- endocrine
- Severity
- mild
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Fatigue or weight changes
(endocrine)Mild symptoms that may not significantly impact daily life.
Frequency: Varies
Fatigue
(endocrine)Cold intolerance
(endocrine)Constipation
(endocrine)Memory impairment
(endocrine)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Endocrine management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Thyroid Hormone Replacement
First-line pharmacological treatment using synthetic thyroid hormone to restore normal hormone levels. Regular dose adjustments based on laboratory monitoring ensure optimal therapeutic effect.
Thyroid Function Testing
Regular blood testing to monitor thyroid hormone levels and guide medication dosing, ensuring the treatment remains calibrated to individual needs over time.
Additional treatment options
Iodine and Nutrient Optimization
Dietary assessment and optimization including ensuring adequate iodine intake and identifying foods that may interfere with thyroid hormone absorption or function.
dietaryMetabolic Support Lifestyle
Lifestyle modifications supporting metabolic health including regular physical activity, consistent sleep patterns, and stress management to complement medical treatment.
lifestyleMood and Cognitive Support
Addressing psychological symptoms including mood changes, fatigue, and cognitive effects through counseling and support, particularly important during initial treatment adjustment period.
psychologicalWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Hypothyroidism?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Garber JR, Cobin RH, Gharib H, et al. Clinical practice guidelines for hypothyroidism in adults: sponsored by the American Thyroid Association. Thyroid. 2012.
Chakera AJ, Pearce SH, Vaidya B. Treatment for primary hypothyroidism: current approaches and future possibilities. Drug Des Devel Ther. 2012.
Fatti LM, Perey L, Giavoli C, et al. Levothyroxine therapy in hypothyroidism: a meta-analysis of randomized controlled trials. J Clin Endocrinol Metab. 2020.
Biondi B, Wartofsky L. Treatment with thyroid hormone. Endocr Rev. 2014.
Medication Comparisons
Compare medications used to treat Hypothyroidism. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy