I've been off my bike for three weeks due to a saddle sore that is clearing up/getting better. It was not a usual saddle "boil" but rather a chunk of cartilage-like stuff about 5 cm by 3 cm by 1 cm thick that just grew out of nowhere and is now slowly getting much smaller/better. This occurred right between by right sit-bone and saddle. The skin was never broken and not even reddened. Does anyone have an idea what the heck this thing is and how to treat?