I started out using a steroid mouth rinse. It worked well except that I was urinating frequently around the clock.
My local Dermatology PA researched and came up with another rinse with no steroid in it. It is called Tacrolimus. I get it from the compounding pharmacy. It really helps. I also sometimes rinse with Dental Pro 7. It is a herbal mixture from the UK. You can use it to brush your teeth also. If I have a particular red, irritated spot, I will put a couple drops on my finger and rub it on the spot. It will relieve the pain and soreness.