Thyroid Nodule: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Thyroid Nodule?
An endocrinologist, a doctor who treats hormone glands such as the thyroid, usually leads care for a thyroid nodule. A surgeon who is experienced with the thyroid may also be involved if a nodule needs to be removed. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is a thyroid nodule?
A thyroid nodule is a growth, or lump, in the thyroid gland. The thyroid is a butterfly-shaped gland in the lower front of the neck. It makes thyroid hormone, which helps the body use energy and stay warm.
Thyroid nodules are very common. By age 60, about half of all people have one that can be found by an exam or with imaging. More than 90% of these nodules are benign, which means they are not cancer. Only a few are due to thyroid cancer.
Symptoms
Most thyroid nodules do not cause symptoms. Doctors often find them during a routine exam or during imaging tests done for another reason. Some people notice a lump in the neck themselves, for example while looking in a mirror.
Large nodules can press against other structures in the neck. This can cause:
- A visible goiter, which is an enlarged thyroid gland.
- Hoarseness or a changing voice.
- Problems breathing, especially when lying down flat.
- Problems swallowing food.
A nodule that makes too much thyroid hormone will likely cause signs of an overactive thyroid. These include:
- A fast pulse and palpitations, which feel like a pounding heart.
- Weight loss.
- Tremor, which means shaking.
Causes and who gets it
Thyroid nodules are caused by an overgrowth of cells in the thyroid gland. They occur more often in women than in men. A person's chance of getting one goes up with age. A cause is not always found.
Hashimoto disease, in which the immune system reacts against the thyroid, is linked to nodules. Lack of iodine in the diet can also cause them, but this is very uncommon in the United States.
A nodule is more likely to be cancer if you:
- Have a hard nodule.
- Have a family history of thyroid cancer.
- Are younger than 20 or older than 70.
- Have had radiation exposure to the head or neck.
How doctors diagnose it
Your doctor feels your thyroid to see if it is enlarged and whether there is one nodule or several. Blood tests, including TSH (thyroid-stimulating hormone), check whether your thyroid is working normally. An exam and blood tests alone usually cannot tell whether a nodule is cancer.
A thyroid ultrasound uses sound waves to make a picture of the thyroid. It can show whether a nodule is solid or filled with fluid, and how big it is.
A fine needle biopsy uses a very thin needle to take cells from the nodule. A pathologist, a doctor who studies cells, then looks at them under a microscope. Sometimes the result is indeterminate, which means the cells cannot be clearly called benign or cancer. A thyroid scan with nuclear medicine is still used for rare nodules that cause an overactive thyroid.
Treatment
Noncancerous thyroid nodules are not life threatening. Many do not need treatment. A nodule that is benign on biopsy, or too small to biopsy, should be watched closely with an ultrasound every 6 to 12 months and a yearly exam.
A nodule that contains thyroid cancer, or is highly suspicious for it, should be removed by an experienced thyroid surgeon. Your doctor may also suggest surgery to remove all or part of the thyroid if the nodule is:
- Causing symptoms such as swallowing or breathing problems.
- Biopsied with an inconclusive result, so no one can tell whether it is cancer.
- Making too much thyroid hormone.
A nodule that makes too much thyroid hormone may be treated with radioiodine therapy. This reduces the size and activity of the nodule. Women who are pregnant or breastfeeding are not given this treatment. Surgery and radioactive iodine can both cause lifelong hypothyroidism, which means an underactive thyroid. It is treated with thyroid hormone replacement, a daily medicine.
When to see a doctor
Contact your doctor if you feel or see a lump in your neck, or if you have any symptoms of a thyroid nodule. Also contact your doctor if you have been exposed to radiation in the face or neck area. A neck ultrasound can be done to look for nodules.
Call 911 or go to the emergency room if you have severe trouble breathing, chest pain, fainting, or a sudden change in how alert or confused you are.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can feel your neck, order thyroid blood tests and an ultrasound, and refer you to an endocrinologist or a surgeon if a nodule needs a biopsy.
Common questions
Are thyroid nodules cancer?
Most are not cancer. Only a few are due to thyroid cancer.
Do thyroid nodules need to be removed?
No, not always. Surgery may still be recommended if the nodule keeps growing or develops worrisome features on ultrasound.
Can a thyroid nodule cause an overactive thyroid?
Yes, some can. A nodule that makes too much hormone is called a hot nodule.
Does a thyroid nodule hurt?
Rarely. A nodule large enough to press on the windpipe or esophagus can cause trouble breathing or swallowing.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
