Sore bones for no reason may be related to osteoporosis, osteoarthritis, bone tumors and so on. 1. Osteoporosis: Osteoporosis is a systemic bone disease characterized by low bone mass, damaged bone microstructure, increased bone fragility and easy fracture. It can be manifested as bone pain in the trunk and limbs, accompanied by fatigue, and in severe cases, spinal deformity or even fracture can occur. 2. Osteoarthritis: Osteoarthritis is a kind of chronic joint disease characterized by degenerative changes of articular cartilage and secondary osteophytes, which can be manifested as pain in joint bones, accompanied by joint swelling, deformity and activity limitation. 3. Bone tumor: primary bone tumor, such as bone cyst, can stimulate bone and periosteum due to its expansive growth. Lung cancer, prostate cancer and other malignant tumors metastasize to bones, which can cause bone pain and soreness and even lead to pathological fracture. There may be other reasons for bone soreness for no reason. It is recommended to go to the hospital in time, improve the CT and MRI examination of the back, and give targeted treatment or therapy after clear diagnosis.