A thyroid ultrasound is usually not painful. The healthcare professional spreads cool gel on the front of your neck and gently moves a small handheld probe over your skin. You may feel light pressure, and lying with your neck tipped back can be uncomfortable for a short time. The scan uses sound waves, not needles or radiation, and most people can return to normal activities afterward.
What Does a Thyroid Ultrasound Feel Like?
During a thyroid ultrasound, you lie on an examination table while a healthcare professional examines the thyroid gland at the front of your neck. The procedure does not involve cutting the skin or inserting instruments into your body. Most people experience little or no discomfort.
According to MedlinePlus, a thyroid ultrasound is a painless test that may cause very little discomfort. The gel placed on your neck can feel cold at first, and you may notice gentle pressure as the handheld probe moves across your skin.
The experience is generally straightforward, although keeping your head tilted slightly backward may feel uncomfortable if you find that position difficult. You can tell the person performing the scan if you need a brief pause or a more comfortable position.
Why Might a Thyroid Ultrasound Feel Uncomfortable?
Although the ultrasound itself should not normally hurt, a few parts of the procedure may cause temporary discomfort:
- Cold gel: The water-based gel may feel cool when first applied to your neck.
- Pressure from the probe: The handheld device needs to maintain contact with your skin to produce clear images. You may feel gentle pressure while it moves over the area.
- Neck positioning: You may need to lie on your back with your neck slightly extended. Holding this position can become uncomfortable.
- Existing neck tenderness: If your neck is already sore or sensitive, pressure around the area may be uncomfortable. Tell the sonographer about this before the scan begins.
- Remaining still: You may need to keep your head and neck steady while the images are taken, which can feel awkward for some people.
The Cleveland Clinic explains that the probe may feel slightly uncomfortable, but it should not need to press hard enough to hurt. If you experience pain during the examination, tell the person performing it rather than trying to tolerate the discomfort.
What Happens During a Thyroid Ultrasound?
Knowing what to expect can make the procedure feel less intimidating. A thyroid ultrasound is a noninvasive imaging test that uses sound waves to create pictures of the thyroid and nearby tissues in your neck.
Before the scan
You will usually be asked to lie on your back on an examination table. Depending on the clinic, you may need to change into a gown. Wearing clothing with an open or loose neckline and removing necklaces can make it easier to examine your neck.
A thyroid ultrasound generally requires no special preparation. The American College of Radiology's patient information resource, RadiologyInfo.org, explains that this examination typically needs little to no preparation. You can usually eat, drink, and take your regular medicines as normal unless your healthcare team has given you different instructions.
During the scan
The sonographer or other qualified healthcare professional applies a small amount of water-based gel to the front of your neck. They then move a handheld device, called a transducer, across the skin. The device sends sound waves into the body and detects the returning signals to create images on a screen.
The probe may be moved across several parts of your neck to obtain views from different angles. You may be asked to keep still while the images are collected. The gel is wiped away when the examination is finished.
A thyroid ultrasound often takes around 30 minutes, although the actual time varies according to the examination and the images needed. The test does not require an injection or an incision, and the ultrasound itself does not expose you to ionizing radiation.
How Can You Make the Scan More Comfortable?
You usually do not need pain medicine or special preparation for a routine thyroid ultrasound. A few simple steps may help you feel more comfortable during the appointment:
- Wear a comfortable top that allows easy access to your neck.
- Remove necklaces or other neck jewellery before the scan.
- Tell the sonographer if your neck is painful, you have difficulty lying flat, or holding your head back is uncomfortable.
- Ask whether a pillow or a small adjustment to your position is possible if your neck begins to feel strained.
- Speak up if you feel pain, rather than assuming that discomfort is a necessary part of the test.
According to Guy's and St Thomas' NHS Foundation Trust, head and neck ultrasound is generally a simple and comfortable examination that does not require injections or special preparation. Let the healthcare team know about any concerns before the scan so they can explain what will happen and help you get settled.
Is a Thyroid Ultrasound the Same as a Thyroid Biopsy?
No. A routine thyroid ultrasound and a thyroid biopsy are different procedures. Understanding this distinction is important because a biopsy involves a needle and may cause discomfort that does not occur with an ultrasound alone.
A thyroid ultrasound produces pictures of the gland without breaking the skin. A thyroid biopsy, often called a fine-needle aspiration, involves inserting a thin needle into a thyroid nodule or another area to collect cells for examination. Ultrasound may be used to guide the needle to the correct location.
The RadiologyInfo.org guide to ultrasound-guided thyroid biopsy explains that patients may experience pressure from the probe and mild discomfort from the needle. The biopsy area may also remain sore or tender for a short time afterward. These sensations are related to the sampling procedure, not to a standard thyroid ultrasound.
If your appointment is for both an ultrasound and a biopsy, ask the clinic which procedures are planned. Knowing whether a needle will be used can help you prepare for the correct examination.
Does a Thyroid Ultrasound Have Side Effects?
A routine thyroid ultrasound is considered a very safe imaging test. It uses sound waves rather than X-rays, and it does not require a needle, injection, or surgical incision. The gel may feel cold, but it is generally easy to wipe off after the procedure.
Most people can leave the clinic and continue their usual daily activities immediately after the scan. No recovery period is normally needed. If you experience pain during the examination, tell the sonographer so they can assess whether the probe pressure or your position needs adjusting.
When Should You Speak to a Healthcare Professional About Neck Pain?
Brief discomfort caused by positioning or pressure during an ultrasound should ease when the pressure stops or your position changes. Pain that is persistent, worsening, unusual, or present outside the examination should not automatically be attributed to the scan.
Contact a healthcare professional if you have ongoing or worsening neck pain, new swelling, or discomfort that interferes with swallowing or everyday activities. Seek urgent medical assessment if you develop difficulty breathing or cannot swallow saliva. These symptoms need assessment on their own merits, whether or not you have recently had an ultrasound.
What Happens After the Ultrasound?
Once the scan is complete, the images are reviewed by an appropriately qualified healthcare professional, such as a radiologist. The report may describe the thyroid's size and appearance and identify features such as nodules, cysts, or changes in nearby tissues.
An ultrasound provides information about the structure of the thyroid, but it does not measure how well the gland produces hormones. Your clinician may interpret the findings alongside your medical history, examination, and blood tests. If an area needs closer assessment, additional tests or follow-up imaging may be recommended. An unusual ultrasound finding does not automatically mean that a serious condition is present.
Overall, a routine thyroid ultrasound is usually painless and requires little preparation. You may feel cold gel, gentle pressure, or temporary discomfort from keeping your neck in position, but the test should not normally hurt. Let your healthcare team know if you have concerns or experience pain during the examination.