From life experience, washing feet is a good habit, removing body stains and growing on toes. . . Um ... . Insects, even those caused by decay.
Dreams can actually express the real situation, or they can be psychological.
So, you have to ask yourself first, is your foot uncomfortable again?
Then it may also be a manifestation of mental state. I don't know how to say it, but it may mean that you have a lot of chores and troubles recently.