My daughter is 7 yrs old . We did Root canal for a milk molar teeth and five fillings for the remaining teeth 45 days back . Now she is telling pain over the crown . Consulted a dentist . He told that the teeth is good after percussion . The pain may be from nearby moth ulcer . Today she is telling opposite side milk molar teeth pain. Pls guide . Why again and pain in different areas . Whether any Root canal problem or anything else . I attached pic