Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormones, leading to a slowing down of bodily functions. It can affect metabolism, energy levels, and overall health. Common causes include autoimmune diseases like Hashimoto's thyroiditis, certain medications, iodine deficiency, or thyroid surgery.
Symptoms
Symptoms of hypothyroidism can develop slowly and may vary in severity, but commonly include:
- Fatigue: Persistent tiredness or lack of energy.
- Weight Gain: Unexplained increase in body weight despite no change in diet or activity.
- Cold Sensitivity: Feeling unusually cold, even in warm environments.
- Dry Skin and Hair: Rough, flaky skin, or hair loss.
- Constipation: Difficulty having regular bowel movements.
- Depression: Feelings of sadness or low mood.
- Muscle Weakness and Aches: Especially in the arms and legs.
- Joint Pain or Stiffness: Especially in the hands and knees.
- Bradycardia: Slower-than-normal heart rate.
- Menstrual Changes: Heavier or more frequent menstrual periods.
- Hoarseness: Changes in voice, especially a deepening voice.
- Goiter: Enlargement of the thyroid gland, sometimes causing a visible swelling in the neck.
Diagnosis
Healthcare professionals diagnose hypothyroidism through various evaluations:
- Medical History and Symptom Assessment: Discussing symptoms, duration, and any relevant medical history, such as previous thyroid issues.
- Physical Examination: Checking for signs such as dry skin, slow reflexes, or an enlarged thyroid.
- Blood Tests: Measuring levels of thyroid-stimulating hormone (TSH) and thyroid hormones (free T4). High TSH and low T4 levels typically indicate hypothyroidism.
- Thyroid Antibody Tests: Testing for antibodies, such as anti-thyroid peroxidase (anti-TPO), to detect autoimmune causes like Hashimoto's thyroiditis.
- Ultrasound: Imaging of the thyroid gland to detect structural abnormalities, such as nodules or enlargement.
- Radioactive Iodine Uptake Test: In rare cases, used to differentiate types of hypothyroidism.
