Mosquitos

The mosquitos are so bad here right now. My poor boy is a magnet for them and is suffering big time. I don't usually get bit but I got one 4 days ago and it continues to swell, itch and can be quite painful. Now I have an idea of what my son is going through. What repellant have you found that works? Also what I usually use for calming of bug bites isn't working very well so if you have a treatment for that as well, I welcome your recommendations. Thanks!