Some basic symptoms of cancer generally disregarded by men.

Breast Cancer
Yes, men also suffer from breast cancer which is a common cancerous disease acknowledged for females. Breast cancer is actually rare in men but do occur and it is usually more harmful because they tend to be ignored due to lack of knowledge that breast cancer isn't just for the females alone.

In 2017, 2,417 men were diagnosed with breast cancer. Do not take any chances, once you find a lump, tell your doctor immediately.

Changes in your pee/Stool.
Many men suffer some various problems peeing as they grow older, it could be a need to pee more often, a weak burning sensation when they pee etc. This can be caused by an enlarged prostate gland, it can also be caused by Prostrate Cancer. Visit your doctor.

Changes in your testicles.
Unlike prostate cancer, this slowly that you might never notice. Testicular cancer can start anytime it can kick off as just a heaviness or a lump in the testicle. Visit your doctor.

Changes in Lymph Nodes.
This might begin to notice some swelling in the small bean shaped gland found in your armpit, neck etc. In most cases it means tat your immune system is fighting cold or sore throat but certain cancer can also trigger those actions. Visit your doctor.

Hard swallowing/Heartburn.
Most time men have some difficulties while trying to swallow form time to time, this could be a result of throat or stomach cancer.

Heartburn can also lead to a condition called Barrett's esophagus, which occurs when stomach acid damages the lining of esophagus. While it is rare, Barrett’s can make you more susceptible to developing throat cancer.
Refrences.

https://www.cancer.or/