A sodium urine test, also known as a urinary sodium test, is a medical test used to measure the amount of sodium in a person’s urine. Sodium is an essential mineral that plays a critical role in regulating the body’s fluid balance, nerve function, and muscle contraction. The test is often used to diagnose and monitor a range of health conditions, including dehydration, kidney disease, high blood pressure, and heart failure. During the test, a urine sample is collected and sent to a laboratory for analysis. The results of the test can provide important information about a person’s sodium levels and overall health. Depending on the results, further medical treatment or lifestyle changes may be recommended.