Bonjela complete plus this fast and effective ulcer treatment targets pain quickly and has a fast acting healing ingredients to sooth your mouth whilst treating the problem for up to 4 hours it forms a protective layer over the ulcer to target the infection quickly about bonjela applying bonjela onto the sore area will help to numb the pain quickly because it contains a local analgesic pain reliever and anti inflammatory agent to reduce any swelling it also contains an anti bacterial ingr