Bone marrow diseases affect the soft tissue inside bones, where blood cells are produced. These diseases can disrupt the normal production of red blood cells, white blood cells, and platelets, leading to various health issues. Common types include leukemia, lymphoma, and myelodysplastic syndromes, which can result in symptoms like fatigue, frequent infections, and easy bruising. Diagnosis often involves blood tests and a bone marrow biopsy to examine the cells. Treatment options vary depending on the specific disease and may include chemotherapy, radiation therapy, or stem cell transplants. Early detection is crucial for better outcomes.