Hypothyroidism Home A-Z Health Information Health Library A-Z Hypothyroidism Overview Hypothyroidism occurs when the is inadequate production of thyroid hormones in the thyroid gland, leading to a slow metabolism. Common causes Autoimmune diseases like Hashimoto’s thyroiditis, thyroid surgery, or certain medications. Symptoms Fatigue, weight gain, cold intolerance, and depression Diagnosis Blood tests to assess thyroid hormone and TSH levels. Treatment Taking synthetic thyroid hormones (levothyroxine) to restore normal levels. Early diagnosis and treatment can improve symptoms and prevent complications like heart disease and mental health issues, so please contact your doctor if you are feeling tired for no reason or if you have any of the above-mentioned symptoms.If you are taking thyroid hormone medications for hypothyroidism, adhere to your healthcare provider's guidance on the frequency of medical visits. Initially, you may require regular appointments to ensure that you are receiving the correct medication dosage. As time progresses, periodic follow-up check-ups will be necessary for your healthcare provider to oversee your health status and medication effectiveness. Disclaimer: The information in this Health Library is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional with any questions about a medical condition or before starting any treatment. Use of this site and its content does not establish a doctor–patient relationship. In case of a medical emergency, call your local emergency number or visit the nearest emergency facility immediately.