Hi.. Thanks for contacting practo for health query. This is Dr.Shanmugavadivu answering your question. Bee sting in foot is it? The most important part is removal of stinger means the base ,it has to  be carefully removed.Since it is seven hours before and since she has not had any  allergy  do not worry.But then also get a paediatrician opinion and have a tetanus toxoid injection,antibiotics,anti oedema measures if warranted. But ,never allow get to get a sting again ,it could turn problematic