If the right side of the back pain occurs when sneezing, the following possibilities should be considered: First, it is possible that the back muscles or ligaments are strained due to the large amplitude of the movement after sneezing, and the strain leads to this painful symptom. Secondly, if the patient has a pneumothorax, the pneumothorax may rupture due to excessive force during sneezing, which may lead to a pneumothorax.