My 20-month-old daughter has ulcers in her mouth and she eats very little. Is there anything that can be done for this?

Yes, there are things you can do to help with mouth ulcers in young children. You can cover the ulcer with a cream to reduce pain while eating, and try to give them foods that are not too acidic or hot. It's also important to find out the cause of the ulcer to prevent more from occurring in the future.