While showering just now, I felt some tenderness around my anal area. On investigating, it appears I have a large and painful lump in my perineum. I tried to squeeze, but nothing came out. It feels about the size of a finger pad. I've asked Dr Google and I think it's a perianal absess. Do I need to see a GP about this? What should I do if they don't have any appointments for a few weeks? Is it likely to pop and go on its own?