4. Growing pains usually occur on both sides of the body.
Most often, growing pains occur in the legs—specifically, in the thighs, calves, shins, ankles and in the area behind the knees. Typically, both legs are affected, though sometimes it is just one. Some children also experience pains in their arms. As with leg pain, arm pain most often happens in both arms, though sometimes just one arm is affected. Usually children with arm pain also have leg pain. Growing pains can range from mild to very severe, typically lasting 5 to 30 minutes. However, some children experience pain for a few hours.