You can take a shower only about three weeks after the rib split, because it takes about two weeks after the rib fracture or bone fracture for the bone scabs to form and the fracture ends to begin to connect, and by the third week or so the fracture ends are connected in a more stable position, at which time the pain can be significantly improved, and you can take a shower when there may be no obvious pain symptoms when you exert local force. If it is too early, it may lead to stress reaction of the fracture end, and there will be friction, which will aggravate the local pain related performance. However, care should be taken not to move too much during the bathing process, because if it is too much, it may cause the fractured end of the rib to become displaced again and aggravate the condition. After taking a bath, it is important to keep warm and not to get cold. Once you get cold, the local blood circulation will be slowed down, resulting in local bruising and inflammation to the peripheral nerves, which will aggravate the pain symptoms.