Bone diseases refer to a variety of conditions that affect the strength and structure of bones. Common examples include osteoporosis, where bones become weak and brittle, and osteogenesis imperfecta, a genetic disorder that leads to fragile bones. These diseases can result from factors such as aging, hormonal changes, nutritional deficiencies, or genetic predispositions. Symptoms of bone diseases may include pain, fractures, and deformities. Diagnosis often involves imaging tests like X-rays or bone density scans. Treatment options can range from medications and supplements to lifestyle changes, such as increased physical activity and improved nutrition, to help maintain bone health.