Hypothyroidism (Underactive Thyroid)
Hypothyroidism is when the thyroid gland makes too little thyroid hormone, slowing the body down. It is common, especially in women, and is easily treated with a daily tablet.
Causes & risk factors
- Autoimmune thyroiditis (Hashimoto disease)
- Iodine deficiency in some regions
- Previous thyroid surgery or radioactive iodine treatment
- Certain medicines
- Thyroid inflammation after pregnancy
Common symptoms
Tests & diagnosis
Treatment & management
- Daily thyroid hormone replacement (levothyroxine)
- Taken on an empty stomach, with the dose adjusted by blood tests
- Regular TSH monitoring to fine-tune the dose
- Lifelong treatment in most cases
- Iodine-sufficient diet where deficiency is a factor
When to see a doctor urgently
- Persistent tiredness, weight gain and cold intolerance
- A high TSH on a blood report
- Symptoms during or after pregnancy
- Extreme drowsiness or confusion — rare emergency
Not a diagnosis. MedDroid gives general educational information about hypothyroidism (underactive thyroid). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Do I need thyroid tablets for life?
Usually yes, as most causes are permanent, but the dose is adjusted over time. Some temporary thyroiditis settles on its own — your doctor decides based on the cause.
Can hypothyroidism cause weight gain?
It can cause modest weight gain, largely from fluid and a slower metabolism. Treatment helps, but diet and activity still matter for overall weight.
Explore more
MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.