Bees!

I need your help. N has a rash on his bottom.
We aren't 100% sure what has happened for him to get this rash. A couple places are extremely red and raw. We have been putting A&D ointment on it just to get a barrier on his bottom.

The only thing we can think that caused it has we introduced dairy over the weekend.

Help?!? I guess I just want his bottom to feel better.