Only men have a prostate gland. The prostate is usually the size and shape of a walnut and grows bigger as you get older. It sits underneath the bladder and surrounds the urethra – the tube men urinate (pee) and ejaculate through. Its main job is to help make semen – the fluid that carries sperm.
Prostate cancer can develop when cells in the prostate start to grow in an uncontrolled way. Prostate cancer often grows slowly to start with and may never cause any problems. But some men have prostate cancer that is more likely to spread. This needs treatment to stop it spreading outside the prostate.
Prostate cancer that’s contained inside the prostate (called localised prostate cancer or early prostate cancer) doesn’t usually cause any symptoms. But some men might have some urinary problems. These can be mild and happen over many years and may be a sign of a benign prostate problem, rather than prostate cancer.