Blood cancer accounts for approximately 10% of all cancers , but although large numbers of patients are diagnosed each year, there is still a general lack of understanding about the warning symptoms of the disease. ​What is blood cancer? ​Most common forms: leukemia, myeloma, and lymphoma. ​Leukemia and myeloma occur when there are too many abnormal cells in the blood and bone marrow (where blood cells are made). This means that not enough normal blood cells are made, which can lead to anemia, infection, and bruising or bleeding. ​Lymphoma patients tend to have an increased number of cells in the lymph nodes, which leads to their enlargement. However, with all of these diseases other organs can also be affected. ​There are some of the most common symptoms of blood cancer that, if detected early, could lead to an early diagnosis of the life-saving disease. ​Extreme Fatigue ​Most of us feel completely exhausted if it is unusual or persistent, we should seek medical advice. ​If you are having Persistent tiredness as well as shortness of breath (even when sitting or resting), Consult a doctor as soon as possible. It may be more serious condition, it can also be an indicator of anemia, which is a major symptom of blood cancer.