Hi, I'm sorry to be asking such a personal question, but I am experiencing localized swelling of the labia majora. It is only occurring at the top of the left labia. It feels a little like a small lump, but I can't tell if that's due to vascular swelling. There is redness, but it is only painful if pressed or manipulated. This has happened before, but does not seem to have any connection to my monthly hormonal changes. I would really like to know why this is happening and if it is something I should be concerned about.