I have a hard lump just on my tailbone... It feels hard on touch does not hurt on touch or otherwise. I believe I am able to move it slightly around but I'm not 100% certain because it could be skin moving over it. It has been appearing and disappearing over past two to three months, taking about two weeks at a time for each phase... It hurt on mild touch when it appeared first time around but now it does not... I do however feel sharp pain if I press hard on it. I am a 26 year old man...