Treating mouth ulcers There are lots of mouth ulcer treatments... Unfortunately though, because of the moisture in the mouth, it is difficult for many of them to stay put. This means that the medicine(s) they contain tend to be washed away by saliva etc, thus affording little or no physical barrier to protect the sensitive lesion. This can be especially problematic when eating and drinking, because this is when you most need to protect the ulcer from irritant foods such as those that are acidic, spicy, salty, coarse, or hot and cold and cause pain and aggravate symptoms. What\'s different about iglu? iglu gel and iglu rapid relief gel are remarkable, fast and effective pain-relieving and antiseptic mouth ulcer treatments. It sticks over the ulcer to protect it from further irritation and damage, and helps speed the healing process - It really works!