A traumatic ulcer is larger and usually starts as a sore patch on the inside of the cheeks, possibly after injury or by the biting or rubbing of a rough tooth. It enlarges to form a painful yellow crater. It heals very slowly and takes 10-14 days to clear completely. White, painful blisters on the roof of the mouth, on the gums and inside the cheeks can be the result of primary infection with the cold sore virus. Small, creamy-white, painful raised areas anywhere on the tongue, gums or lining of the mouth.
Ulcers usually cause pain and consequential loss of appetite.
See also Cold sore Thrush. There is nothing which can be done to speed the healing process. The only way to treat mouth ulcers is to relieve the pain. They are painful and can sometimes cause loss of appetite and interfere with the child's eating. Check to see if there are any areas of soreness if your child complains of a sore mouth or tongue.