I have a small, open, canker sore-like crack on the inside of my labia minora . I ve been with the same person for 4 years and have never experienced any issues down there. It s not really painful unless I touch it. I think it may be due to whiping after using the bathroom. The skin on my LM is extremely thin, so I think it s just irritated, but I m worried it may be something else. Any ideas?