Healthy young men in Texas are being diagnosed with chronic kidney disease of unknown origin, or CKDu, a condition that is typically found in Central America. Unlike common forms of kidney disease, which are often linked to conditions like diabetes or high blood pressure, CKDu has no clear cause and can be fatal. Doctors in Texas have recently reported a rise in cases of this mysterious illness, marking the first known occurrences in the United States. Researchers have previously identified CKDu in countries like Sri Lanka, India, and Nepal, but these are the first recorded cases in the U.S. Epidemiologists are still trying to determine the exact cause of CKDu, but studies have consistently shown that physical labor in extreme heat is a contributing factor. American health experts are now concerned about a possible increase in CKDu cases, particularly among agricultural workers who are often exposed to high temperatures and physically demanding conditions. Most of those affected are Latino men between the ages of 20 and 60, who work in environments with limited access to medical care and protective measures. In Central America, CKDu is believed to be linked to occupational and environmental factors that primarily affect young men working in lowland agricultural settings, especially sugarcane harvesters. The reasons why this condition disproportionately impacts agricultural workers and those performing intense physical labor remain unclear. These communities often face significant barriers to healthcare, and kidney disease screening is rarely a priority. As a result, many cases go undiagnosed or unreported, making it difficult to fully understand the scope of the problem. Dr. Ricardo Nuila, an internist at Houston’s Ben Taub Hospital, has reported encountering cases of CKDu nearly every day. His colleague, Dr. Sreedhar Mandayam, a nephrologist at the same hospital, noted a sharp increase in emergency-dialysis patients who were young men, many of whom were undocumented immigrants from Central America or Mexico. Between 2012 and 2015, medical records showed that out of 346 cases of kidney failure among uninsured or undocumented patients, 17 had no identifiable cause. This number shocked researchers, who believe it may indicate that thousands of emergency-dialysis visits to Texas hospitals each year could be linked to CKDu. However, there is currently no data on how many of these cases have resulted in death. More research is needed to understand the disease and its impact on vulnerable populations.