Symptoms
Common signs:
- Racing heart and weight loss
- Racing or pounding heartbeat
- Can't stand the heat, or sweating a lot
- Losing weight without trying
- Bulging eyes or swelling at the front of the neck
Less common
- Shaking
- Heat intolerance
- Anxiety
- Bulging eyes
When to get medical care
Call 911Very fast heartbeat with fever or confusion.
Get care todayRacing heart or chest pain.
See a doctor soonSymptoms.
Causes
Autoimmune, nodules.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
Who is more likely to get it
- Women
Possible complications
Diagnosis
Blood tests.
Tests
Tests, if needed:
- TSH, T4:
Treatment
Treat it.
Self-care
- Take medicines as prescribed
Medicines
Medicines that may help:
| Medicine | Helps with | Good to know |
|---|---|---|
| Antithyroid medicines | Hormone | |
| Beta blockers | Racing heart |
OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.
Which doctor treats this
- Start with your primary care provider (family doctor or internist).
- They may send you to an endocrinologist (hormone doctor).
Living with it
- Take thyroid pills the same way every day, often on an empty stomach.
- Get blood tests as advised.
- Long-term illness can affect mood. Tell your doctor if you feel down or anxious.
Support groups and helplines
- American Thyroid Association: Patient guides and support group finder.
Back to school, work, or sports
- Most people can keep working or going to school.
- Ask about changes that help, like extra breaks or a flexible schedule. Workers may be covered by the ADA. Students may get a 504 plan.
Pregnancy and breastfeeding
- If you're pregnant or planning to be, tell your prenatal provider about this condition.
- This condition needs closer checkups during pregnancy. Plan ahead with your doctor.
- Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
- Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
- Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.
For caregivers
- Go to visits when you can and take notes.
- Keep a list of medicines, allergies, and doctors in one place.
- Learn the warning signs that need fast care.
- Take breaks and ask for help. Caregivers need care too.
Outlook
Treatable.
Getting ready for your visit
Bring a list of your symptoms and medicines.
What to bring
- A list of your medicines and supplements
- Notes on when symptoms started and what makes them better or worse
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Overactive thyroid (hyperthyroidism)
Sources
Last updated 2026-11-12.