Proteinuria means there's too much protein in your urine. Normally, your kidneys filter waste from your blood while holding on to substances your body needs, like protein. When the kidneys are damaged, that filtering system weakens, allowing protein to leak through into your urine. When it is consistently more than 150mg a day, a work up is needed to determine the cause.Proteinuria doesn't always point to a serious chronic problem — sometimes it's temporary, triggered by things like fever or intense exercise. But when protein in the urine is persistent, it can be an early sign of kidney damage that needs evaluation and treatment.A number of conditions can lead to proteinuria, including diabetes, high blood pressure, autoimmune disease, genetic kidney conditions, cancer, and certain medications. In some cases, more than one factor may be contributing at once, which is why your doctor will often look at your overall health picture rather than a single test result.Many people with protein in their urine have no symptoms at all, which is why screening matters, especially if you're at risk. When symptoms do occur, they may include foamy or bubbly urine, or swelling in the legs, ankles, or around the eyes. Anyone with these signs, or with risk factors like diabetes or high blood pressure, should be checked by their doctor.To determine if someone has it, the first step is usually a simple urine analysis. If protein is found, your doctor may order additional tests, such as a spot urine test measuring the protein-to-creatinine ratio, or a 24-hour urine collection for a more complete picture. Blood tests are also important, since they help confirm that your kidneys are functioning properly overall and can point toward an underlying cause.The encouraging news is that lowering protein levels in the urine through treatment can slow the progression of kidney disease and improve long-term outcomes. Catching and addressing proteinuria early can meaningfully protect your kidney function.Treatment depends on the underlying cause. Some medications are used broadly for proteinuria, including certain blood pressure medications (ACE inhibitors or ARBs) and newer medications originally developed for diabetes that also help protect the kidneys. For specific underlying kidney diseases, other treatments — such as steroids or immune-suppressing medications — may be used, sometimes guided by a kidney biopsy.General health measures also play a key role: keeping blood pressure below 130, following a low-salt diet, and maintaining a healthy weight.Early detection and treatment of proteinuria can make a real difference in preserving kidney function and preventing complications. If you've been diagnosed with proteinuria, work closely with your doctor to monitor your condition and follow your treatment plan.
