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Besides hot weather and strenuous activity, other causes of heat exhaustion include: Dehydration, which lessens your body's ability to sweat and keep a normal temperature. These tests can show if you have too much or too little thyroid hormone. Then it can be studied further for signs of cancer. It often means having a physical exam and thyroid function tests regularly.

During the procedure, a healthcare professional puts a very thin needle in the nodule and removes a sample of cells. This means simply watching your condition. The samples go to a lab for study under a microscope. There are few risks. Some nodules take up less of the iodine. If it's not clear from biopsy results whether a nodule is cancer, the nodule might need to be removed. It takes about 20 minutes.

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You'll likely have another biopsy if the nodule grows. This may include:. A nodule that isn't cancer might need surgery if it's large enough to make it hard to breathe or swallow. They take up more of the iodine than typical thyroid tissue does. Hot nodules are rarely cancer. They're called cold nodules. These tests measure blood levels of thyroid-stimulating hormone TSH and hormones your thyroid gland makes.

Watchful waiting.

For hot flashes, you'll likely start by seeing your main healthcare professional or a specialist in conditions of the female reproductive system, called a gynecologist.

But a thyroid scan can't tell which cold nodules are cancer and which are not. Your healthcare professional checks the lump or nodule in your neck to rule out cancer and to make sure your thyroid is working as it should. The biopsy most often is done in a healthcare professional's office. That's especially true if the goiters block airways, the esophagus or blood vessels. A thyroid scan tells more about the thyroid nodules.

Nodules that make too much thyroid hormone, called hot nodules, show up on the scan. Ultrasound imaging might guide the needle. A biopsy of nodules can make sure there's no cancer. People with large multinodular goiters might need surgery. They can be cancer. If your thyroid nodule doesn't change, you might not need treatment. Thyroid scan. During this test, radioactive iodine is put into a vein in your arm.

If a thyroid nodule is making too much thyroid hormone, you might need treatment for hyperthyroidism. It also may include an ultrasound. Tests might include:. Fine-needle aspiration biopsy. You then lie on a table while a special camera makes an image of your thyroid on a computer screen. Thyroid function tests.