Hi and thanks for the query, It might be necessary to get the child properly examined by a physician. The persistence or intensification of the pain might imply that a chest x ray to exclude a possibility of a rib cage fracture. Other lung traumatic lesions or problems with the rib cage must be excluded. Persistence of pain, failure to respond to treatment or aggravation of the pain or other associated symptoms might require a more detailed or critical evaluation. She is a child and its better to exclude something serious that she might not be able to describe. A physician,s examination and chest X ray are fundamental. Best regards, Luchuo, MD.