20 Most Common Cancer Signs that You Probably Ignored – But shouldn’t

16. Abdominal pain or nausea

We all feel a little bit discomfort in our stomach when eating something wrong. However, unexplained abdominal discomfort, usually above the navel that lasts more than two weeks can be an early warning sign of liver, pancreatic or various digestive system cancers. The pain may start as mild and then get more intense as the disease progresses.