Prostate cancer is the most common type of cancer to be diagnosed in men in the United Kingdom. Diseases affect the prostate – a small gland found in the pelvis in men. It is not always easy to know if you are at risk for prostate cancer, as the symptoms tend to develop very slowly over a long period of time. But one of the most common signs of prostate cancer is the difficulty in urinating.
Struggling to pass urine, whether it's a weak urine stream, or having to strain your pee, could be a sign of prostate cancer.
It may be caused by a tumor that grows so large that it puts pressure on the urethra, Macmillan's cancer support said.
Some people may even find that they are passing more urine than normal, or they may feel like their bladder is not really empty, even after they have done so.
"Prostate cancer often grows slowly," the charity said. "Symptoms may not develop for many years.
"Men with early prostate cancer may not have any symptoms, since these occur only when the tumor is large enough to press on the urethra.
"The prostate can also enlarge due to a condition called benign prostatic hyperplasia [BPH], which is not carcinogenic.
"Symptoms of benign (non-cancerous) enlargement of the prostate and prostate cancer are similar.
"They can include difficulty peeing, having to pee more than usual, feeling like I haven't completely emptied my bladder after peeing, and an urgent need to pee."
You could also be at risk of prostate cancer if you find blood in your urine or sperm, or if you have pain during peeing, he added.
If you have any of these signs or symptoms, you may want to talk to a doctor immediately, he urged.
If the cancer has spread to other parts of the body, it could lead to bone or back pain, loss of appetite or even pain in the testicles.
The exact cause of prostate cancer is not entirely known, the NHS said. But you may have a greater risk of the condition if you have a family history of prostate cancer.
Obesity can increase the chances of contracting the disease, while there is some evidence that a diet rich in calcium could increase the risk.
You should talk to a doctor immediately if you are worried about prostate cancer symptoms or if you think you are at risk.
About 50,000 new cases of prostate cancer are diagnosed each year in the UK.
But 84% of all patients live for at least another 10 years after the initial diagnosis, Cancer Research UK said.