Hi - I have had Crohn's for some 35 yrs - am aware it can spread from the mouth
to the anus. I don't recollect having mouth
ulcers caused by Crohn's, but I had very bad mouth ulcers when on FEC chemo for breast cancer 4 yrs ago. It is a usual side effect of some chemos. The Oncology dept supplied foc various meds - I think the mouthwashes were Cordosyl and Diflocam and I also had some anti-fungal lozenges, but sorry, can't remember the name.