Leukemia is a blood cancer where the bone marrow makes too many abnormal white blood cells that crowd out healthy cells, causing fatigue, fever, frequent infections, easy bruising, pale skin and swollen lymph nodes in children. Early diagnosis through blood tests and bone marrow exams leads to treatment with chemotherapy, targeted therapy, stem cell transplant or radiation. With expert guidance from Dr Nandini Hazarika, timely care improves outcomes and supports families through this challenging journey.