A urinary catheter is a flexible tube inserted into the bladder to drain urine. It is often used for patients who cannot urinate on their own due to medical conditions, surgeries, or injuries. The catheter can be temporary or long-term, depending on the patient's needs. There are different types of urinary catheters, including intermittent catheters, which are inserted and removed as needed, and indwelling catheters, which remain in place for an extended period. Proper care and hygiene are essential to prevent infections and complications associated with catheter use.