Extracorporeal Shock Wave Lithotripsy (ESWL) is a non-invasive medical procedure used to treat kidney stones. It works by generating high-energy shock waves that travel through the body and break the stones into smaller pieces, making them easier to pass through the urinary tract. During the procedure, a patient lies on a special table while a machine focuses shock waves on the stone's location. ESWL typically requires no incisions and can be performed on an outpatient basis, allowing patients to return home the same day. Most patients experience minimal discomfort and can resume normal activities shortly after treatment.