One I sometimes have is needing to go the bathroom but all the bathrooms I can find have disgusting problems that send me looking for another bathroom instead of relieving myself there.

These always involve either bathrooms from my past (such as at schools I once attended or at places I once worked) or bathrooms in places that as far as I can tell are dream places.

I don't recall these dreams ever involving a real bathroom that I currently had or recently had access to.

When I wake up and remember one of these broken bathroom dreams, I inevitably am in fact in need of an urgent trip to the bathroom, so I suspect that the dream is my sleeping mind's way of telling me I need to wake up and go.

When the dream bathrooms are real bathrooms from my past, such as at a school, they are usually exaggerated. If the real bathroom had 3 stalls the dream version might be much bigger with several dozen stalls with the real 3 merely the 3 closest the door.