Anemia is a common problem in children where the body does not produce enough red blood cells or hemoglobin. There are several causes of anemia including blood loss, insufficient iron intake, and vitamin deficiencies. Diagnosis involves blood tests, smears, and exams. Treatment depends on the underlying cause but may include iron supplements, vitamins, blood transfusions, or medications to increase red blood cell count. Complications can vary from growth issues to cancers if left untreated.