My five year old grandson was at cricket last week when he was stung by a wasp. He is very easily embarrassed and so he quietly told the coach what had happened, but because he wasn't making a fuss the coach didn't believe him and told him to go away. Fortunately my daughter and husband were there and queried what had happened - and sure enough there was a red swelling from the sting, which they then treated.
The kicker to this story is that my grandson has some very severe allergies and carries two Epipens with him at all times. We have always dreaded him being stung because we didn't know what his reaction might be. Fortunately for the cricket coach all was well, but I did feel he'd 'dodged a bullet'.