Hello doctor, I have a pea sized lump between my right buttock and thigh (groin area) that I just noticed a few weeks ago after accidentally shaving over it. It is not painful, but a little sore like a scrape would be. It appears to be solid in the middle and darker, but has almost an inner tube look around it that is pinkish. It does not look like it has fluid in it.
Hi. What your photo shows is a skin ulcer (attachment removed to protect patient identity). There are many reasons for skin ulceration in the groin area. We have to rule out sexually transmitted diseases first of all. I would like to know if you are sexually active, whether your partner has any such problems. How about your general health? Do you have any kind of problems in your other body systems?  For the ulcer, you can apply a topical antibiotic like T-Bact cream daily thrice. It will help it heal if it is a simple bacterial infection. I would suggest you apply it for two weeks, then approach a local dermatologist for a full checkup, in case it is not responding. Get well soon.