Cancersymptoms are often vague. In fact, prostate cancer – the most common cancer in men – has some of the least obvious symptoms. “Men shouldn’t ignore their health,” says Therese Bevers, M.D., medical director of MD Anderson’sCancer Prevention Center. CancerSymptom in Men No. 13: Mouth Changes If you smoke or chew tobacco, youneedto be especially alert for any white patches inside your mouth or white spots on your tongue. Those changes may indicate leukoplakia, a pre-cancerous area that can occur with ongoing irritation. Guy Fasts and Has Cancer.Learn the early symptoms of lung cancer to stay informed about your health. Stay proactive with these helpful tips! Prostate Cancer UK says one in eight men will get prostate cancer at some point in their lives, with about 55,000 cases diagnosed each year. There are about 12,200 prostate cancer deaths every year, according to Cancer Research UK. It is most common in older age - among men over 75. Cancer Research UK says the disease will affect one in two of us during our lifetime. And it is essential to know the signs towatchfor as the earlier the treatment the more likely it will be successful. The charity has a list of 22 symptoms which could be a sign of cancer. Prostate cancer is the most common cancer in men in the UK.