Does Keeping The Retainer On Useful Why Does My Top Retainer Fall Out When I Am Sleeping?

Why Does My Top Retainer Fall Out When I Am Sleeping? - does keeping the retainer on useful

I keep my awakening to a certain reluctance in my bed. I really do not know what harm. Not sure this has nothing to do, but I have a toothache and I saw that my dentist said it should disappear in a few days. He said he gritted his teeth and gums were irritated. Please help me!