It's been 2 weeks since your post so perhaps your situation has changed by now, but here is my experience:
I have had a few instances of what I presume are pimples, or perhaps cysts, in that very area or near my anus. Perhaps 5 or 6 outbreaks in the last 22 years. I notice them when they are fairly small and just somewhat irritating. Then they get larger and more tender. What I do is .. pop them! I get a clean, sharp needle. Then, sometimes with the help of a magnifying mirror, I give the culprit a firm but gentle squeeze to make a head and lance it with the needle. Unfortunately, by the time I can make a head and lance it, it's fairly inflamed. That's a few days or so after I first notice it. I squeeze out the darkish pus until I get clean blood flow. Once or twice I've had to lance the same one the next day or so. After that they go away pretty fast. The last two have been exactly where yours is.
Hope this helps you.