They base it on experiences with people they have had in the past
Answer:Musculoskeletal pain affects bones, joints, ligaments, tendons or muscles....Common symptoms include:Aching and stiffness.Burning sensations in the muscles.Fatigue.Muscle twitches.Pain that worsens with movement.Sleep disturbances.
Explanation:
do you have the signs yu could list? we need them in order to determine the answer