The urethra is a small, narrow tube that carries urine from the bladder out of the body. From the outside, the only visible part is the urethral opening, called the meatus, which looks like a tiny slit or dimple. Internally, it’s a soft, flexible tube lined with moist pink tissue and surrounded by muscle. What the urethra looks like depends on whether you’re looking at the external opening, the internal structure, or comparing male and female anatomy.
The External Opening
The part of the urethra you can actually see is the urethral meatus, the small hole where urine exits the body. In women, this opening sits between the clitoris and the vaginal opening. It typically appears as a small vertical slit or a slight dimple in the tissue, often no wider than a few millimeters. The surrounding tissue is pink and moist, blending in with the rest of the vulvar area. Because of its small size and location, many women have never identified their own urethral opening, which is completely normal.
In men, the urethral meatus is located at the tip of the penis. It appears as a small vertical slit at the center of the glans. The meatus is the narrowest point of the entire male urethra, which is why it’s relatively easy to see as a defined opening. The tissue around it matches the color of the glans, typically a slightly deeper pink or reddish tone.
How the Internal Tube Looks
If you could see inside the urethra (as a doctor might during a cystoscopy), it looks like a narrow, collapsed tube of soft, glistening pink tissue. The walls are made of layered cells that sit on top of a spongy bed of elastic tissue rich with tiny blood vessels. This blood supply gives the inner lining its characteristic pinkish-red color. The surface stays moist with a thin layer of mucus produced by small glands embedded in the urethral wall.
The tube isn’t rigid. When urine isn’t flowing, the walls gently fold inward and press together, so the passage is essentially closed. During urination, the walls stretch apart to let urine pass through, then collapse again afterward. This flexibility comes from the elastic connective tissue just beneath the surface lining.
Size Differences Between Males and Females
The most dramatic visual difference between the male and female urethra is length. The female urethra is roughly 3 to 4 centimeters long (about 1.5 inches), running a short, relatively straight path from the bladder to the opening in front of the vagina. This short length is one reason urinary tract infections are more common in women: bacteria have a shorter distance to travel to reach the bladder.
The male urethra is about 20 centimeters long (7 to 8 inches). It travels from the bladder through the prostate gland, then through the pelvic floor, and finally along the length of the penis. Because it’s so much longer, the male urethra passes through several distinct regions, each with slightly different tissue types. The section near the bladder is lined with the same stretchy tissue found in the bladder itself, while the portion running through the penis is lined with a flatter, more skin-like tissue.
The Sphincters That Control Flow
Two ring-shaped muscles wrap around the urethra at different points, acting as valves. The internal urethral sphincter sits right where the bladder meets the urethra. It’s made of smooth muscle, meaning it works automatically. You don’t consciously control it. It stays contracted to keep urine in the bladder and relaxes when your body signals it’s time to urinate.
The external urethral sphincter sits a bit further down. This one is made of striated muscle, the same type found in your biceps, and you can control it voluntarily. It’s what allows you to hold your urine even when your bladder feels full, or to stop your stream mid-flow. Both sphincters look like small circular bands of muscle tissue when seen during imaging or surgery, similar to a donut wrapped around the tube.
What an Unhealthy Urethra Looks Like
A healthy urethral opening is a clean, small slit with smooth surrounding tissue and no discharge. When something goes wrong, the visual changes are often noticeable. Urethritis, or inflammation of the urethra, can make the tissue around the opening appear red, swollen, and irritated. In men especially, the meatus may look visibly inflamed.
Discharge is one of the most recognizable signs of a problem. Depending on the cause, it can range from a cloudy yellow or white fluid to something tinged with blood. Other signs include visible redness or puffiness at the urethral opening, crusting around the meatus (particularly in the morning), and blood visible in the urine. Pain or burning during urination often accompanies these visual changes, though some infections produce visible discharge before any pain develops.
A urethral caruncle, more common in postmenopausal women, appears as a small, red, fleshy growth at the edge of the urethral opening. It’s usually benign but can be mistaken for something more serious because of its noticeable color and raised shape. A prolapsed urethra, where the inner lining protrudes slightly through the opening, creates a visible ring of dark pink or reddish tissue around the meatus.
Why It Can Be Hard to Find
If you’re trying to locate your own urethral opening, you’re not alone in finding it tricky. In women, the meatus is small enough that it can be difficult to distinguish from the surrounding folds of tissue without a mirror and good lighting. It sits in the vestibule, the smooth area between the inner labia, about halfway between the clitoris and the vaginal opening. Looking for a small dimple or vertical crease in that area is the most reliable approach.
In men, the opening is easier to spot at the tip of the penis, but it can still vary in appearance. Some men have a meatus that’s a clean vertical slit, while others have one that’s slightly more rounded or sits just off-center. Minor variations in the position or shape of the urethral opening are common and rarely indicate a problem unless they’re accompanied by difficulty urinating or a consistently deflected urine stream.