The first thing you should know about the stomach cancer, which is a rather severe health condition, is the extreme ache in the upper abdomen. The greatest difficulty associated with this illness is that it is almost impossible to feel the full spectrum of pain at the initial stages of the problem. Many patients complain of the sharp pain in the area located higher than the navel. Usually, it’s not a norm to feel discomfort when touching this region. However, once the fluid starts to gather in the top abdomen, the pain can be sensed.