4. Breast changes

These include a new lump, dimpling, discoloring, changes around the nipple or unusual discharge. Although breast cancer mostly occurs in women, men can develop it too.

5. Chronic coughing

A cough that persists for more than two weeks, especially a dry cough, can be a sign of lung cancer.

6. Chronic headache

A headache that lasts more than two weeks and doesn’t respond to the usual medications can be caused by a brain tumor.

7. Difficulty swallowing

If you feel as though food is getting stuck in your throat or you have trouble swallowing for more than two weeks, this can be a sign of throat cancer, lung cancer or stomach cancer.