DD has fitted braces fitted this week and now has sores or small ulcers on all sides of her mouth. Can anyone advise what would be good long term to treat these. She has to have alcohol free mouthwash, but I can't find one that treats ulcers. Also, have looked at bongela, but all I've found is one suitable for toddlers and the adult one says 16+, I guess one will be too weak and the other two strong.