Leukemia is a type of cancer that affects the body's bone marrow and causes an uncontrollable increase in white blood cells. It can often go undetected for years since patients choose to ignore symptoms such as fatigue. Fortunately, a simple routine blood test can reveal leukemia quickly so that doctors can begin to tailor a treatment plan. A symptom of leukemia often includes feeling weak or unusually tired. Patients often report that they feel especially tired due to the decrease in the number of red cells in the blood stream. This decrease in red blood cells prevents adequate amounts of oxygen from being delivered to the tissues and muscles. In addition, infections are frequent among leukemia patients due to the body's lack of healthy white blood cells. These types of infections include urinary tract infections, bladder infections, skin infections, lung infections and infections of the mouth and throat. Thirdly, unexplained fevers are another symptom of Leukemia. Leukemia cells can stimulate the brain to raise the body's temperature. Excessive bruising or abnormal bleeding can be another sign of Leukemia. Since Leukemia prevents the body's bone marrow from making enough blood platelets, cells cannot clump together to slow or stop bleeding. This can also lead to frequent nose bleeds, heavy menstrual bleeding and bleeding of the gums. Bone and joint pain can also be a sign of Leukemia, especially in areas where there is a large amount of bone marrow such as the pelvis and breastbone. In addition, Enlarged or swollen Lymph Nodes, also referred to as Leukemia cells can also by a symptom of Leukemia. Abdominal discomfort and swelling, including loss of appetite can be another sign of Leukemia. Lastly, headaches and other neurological symptoms can be a sign of Leukemia. Seizures, dizziness, nausea, vomiting and visual changes can also be causes for concern. While some people who have Leukemia may experience a vast array of symptoms, other patients experience none. Therefore, it is important to receive the appropriate medical tests to confirm a diagnosis of leukemia.