question: Im 18, about 134 lbs 54. I have a small lump under my butt cheek and it comes and goes periodically. It doesnt hurt unless pressure is applied. What could it be? Also I have a vaginal discharge that comes and goes. It doesnt smell like anything, its not all cottage cheesy, and a lot comes out. I dont know what either mean or what they are. Any ideas? Serious enough to go to the Dr?