Musculoskeletal disorders affect the human body's movements and musculoskeletal system. The main organs and tissues involved are cartilages, bones, and muscles. Musculoskeletal disorders can impact nerves, muscles, tendons, ligaments, joints, cartilage, and spinal discs. Some common musculoskeletal diseases include arthritis, joint deformities, gout, myalgia, tendonitis, bursitis, and osteoarthritis. Signs and symptoms may include decreased range of motion, deformity, pain, numbness, and stiffness. Causes can include work stress, awkward postures, physical/psychological hazards, vitamin deficiency, diet, and aging.