1. Unexplained Weight Loss

Weight loss is one of the most common symptoms of cancer. Up to 40% of people who were diagnosed during the earlier stages of cancer said they have had unexplained weight loss, and about 80% in the advanced stage. This sign shows up mostly in people with lung, stomach, or pancreatic cancers.

If you haven’t made any changes to your diet or exercise, and seem to be losing weight no matter how much you eat, then it might be time to consult a doctor.