Is it healthy to swallow saliva when you have mouth ulcers?

It is not especially healthy to swallow the spit. The increased saliva flow is annoying, but swallowing can spread the pathogens in the body. At night, of course, this is particularly difficult. You could try to sleep with slightly raised head so that the saliva does not run so easily in the throat. During the day it is better to rinse the mouth more often, for example with a camomile solution. If you don’t, talk to your doctor. He might give you something against the excessive saliva flow. Don’t worry, the mouth is usually going away from alone after one or two weeks.