<s>[INST] Hi, may I answer your health queries right now ? Please type your query here... My 4 year old son just bumped his head severly on the edge of the bed. He has a big bulge on the right side of his head. He is not dizzy and has not vommitted. He fell asleep 40 min after the fall (a little bit later than normal bed time). We are due to fly from Montana to new York tomorrow noon. Can he fly? [/INST] Hello and welcome to healthcare magic.I would suggest to postpone your flight by at least 24 hours.Because after head bang child is observed for fits decreased  level of consiouness and vomiting.For which child is rushed immediately to hospital emergency department.I hope that won't happen.And wishing you a safe and happy flight after that.Good luck </s>