The main symptoms of bone marrow edema are joint pain, joint swelling, and limited joint movement. The causes of bone marrow edema include osteoarthritis, bone infection, bone tumor and so on. 1. Osteoarthritis: Bone marrow edema caused by osteoarthritis is mainly manifested as joint pain, especially after exertion or strenuous exercise, joint pain, limited joint flexion and extension, some of which are accompanied by joint swelling, and rattling sound of flexion and extension joints. 2. Bone infection: Bone marrow edema caused by osteomyelitis, bone tuberculosis, etc. It mainly manifests as redness, swelling and pain in joints, limitation of joint activities, and elevation of white blood cells and C-reactive protein in laboratory tests. 3. Bone tumor: Bone tumor caused bone marrow edema, mainly manifested as joint pain, especially at night pain is obvious, serious patients will appear wasting and weakness. Bone destruction can be found by taking radiographs. Bone marrow edema is caused by different reasons, the symptoms are not exactly the same, after the occurrence of bone marrow edema, you need to go to the hospital in time to clarify the cause of the disease.