A Foley catheter is a flexible tube inserted into the bladder to drain urine. It is commonly used in medical settings for patients who cannot urinate on their own due to surgery, illness, or other conditions. The catheter has a balloon at the end that is inflated once it is in place, helping to keep it securely in the bladder. Foley catheters come in various sizes and materials, depending on the patient's needs. They are typically made of latex or silicone and can be used for short-term or long-term drainage. Proper care and hygiene are essential to prevent infections while using a Foley catheter.