The reason for developing leukemia could be a combination of genetic and environmental factors.
Leukemia usually occurs when certain abnormalities in the DNA inside normal bone marrow cells. With time these abnormal cells grow and divide continuously replacing healthy blood cells in the bone marrow, abnormal blood cells occupy more space leading to fewer healthy white blood cells. Further leading to symptoms of Leukemia.
Some factors may increase the risk of developing leukemia include:
However, many people with above mentioned risk factors don't develop leukemia