Cancer is the most dreaded word in the medication world and the fact that cancer symptoms are very normal, day-to-day things that we experience makes it more scary. This is why dedicating it becomes difficult. Whether it is a cancer of the liver or lung cancer, you might have very basic symptoms like fatigue, changes in your weight, etc. however, what needs attention is when you feel an area of your body getting thick or creation of a lump. If your bowel movements change, it is a huge sign that something is wrong too.