A harsh pain in the abdomen almost always results in the denial to take any food. The absence of appetite is common among people who become victims of leukemia. The worst thing is that the health care providers cannot define leukemia at the early stage in many cases. Still, if you have other symptoms supported by the harsh abdominal pain, it may be an alarming call to action. Tumors in the areas of the spleen and liver are common in the situation. Patients feel fed up; they also challenge nausea and experience great desire to vomit.