A catheter is a thin, flexible tube used in medicine to help drain fluids or deliver medications into the body. It can be inserted into various parts, such as the bladder or blood vessels, depending on the patient's needs. Catheters are often used for patients who cannot urinate on their own or need intravenous IV therapy for medications. There are different types of catheters, including urinary catheters for bladder drainage and central venous catheters for administering treatments directly into the bloodstream. While they are essential tools in healthcare, proper care and hygiene are crucial to prevent infections and ensure patient safety.