Overview
Ultrasound is a medical imaging test that uses sound waves to make real-time pictures of organs, tissues, or blood flow inside the body. A gel is usually placed on the skin, and a trained professional moves a small device called a transducer over the area being examined. Some ultrasound exams use an internal probe, such as vaginal or rectal ultrasound, depending on what needs to be checked.
Who Is Affected
People of all ages may have an ultrasound, including babies, children, pregnant people, and older adults. It is used in many settings, such as routine pregnancy care, emergency assessment, and follow-up of known health conditions. The type of ultrasound depends on the person’s symptoms, age, sex, and medical needs.
Prevention
Ultrasound itself is not something people usually need to prevent. It is a diagnostic tool used to help evaluate symptoms, monitor pregnancy, guide some procedures, or follow certain conditions. Keeping regular medical appointments may help make sure imaging is done when it is needed.
Diagnosis and Tests
Ultrasound can help healthcare professionals look for gallstones, kidney problems, fluid collections, cysts, pregnancy-related concerns, heart function, and blood flow in veins and arteries. It may be used alone or together with other tests such as blood tests, X-rays, CT scans, or MRI. Before the test, you may be asked to drink water, avoid eating for several hours, or have a full bladder, depending on the exam.
Living With It
Most ultrasound exams are brief and do not require recovery time, so people can usually return to normal activities afterward. Results may be available quickly in some settings, but in other cases a specialist reviews the images before a report is shared. If you do not understand the result, ask what was seen, whether more tests are needed, and what the next step is.
When to Seek Medical Care
Seek medical care if a healthcare professional recommends an ultrasound to investigate symptoms such as pain, swelling, bleeding, a lump, or possible pregnancy-related concerns. Also get medical advice if you are unsure how to prepare for the exam or if you have questions about an internal ultrasound. Contact the clinic ahead of time if you have mobility needs, communication needs, or concerns about discomfort.
When It May Be an Emergency
Ultrasound may be used urgently in emergencies such as severe abdominal pain, possible internal bleeding, signs of ectopic pregnancy, suspected blood clots, or trauma. Seek urgent medical help right away for severe pain, fainting, heavy bleeding, trouble breathing, chest pain, sudden weakness, or symptoms during pregnancy that feel alarming. In these situations, do not wait for an outpatient imaging appointment.
Questions to Ask a Healthcare Professional
You may want to ask: What is this ultrasound looking for? Do I need to prepare in any special way? Will the scan be done on the skin or internally? When and how will I get the results, and what happens if the images do not fully answer the question?