I have this bump on my toe...thought it was a bug bite..about a week ago after showering it came to a head so I popped it..it release a clear oozy sticky fluid. Didn't go away...just reduced a bit in size. Now it's back, so I thought perhaps its a wart..so I treated it as if. Now it's painful and the wart medicine after 4 or 5 days did not do anything but irritate it. What can it be?