What causes lump on the buttock just below the tailbone?
Patient: I have a painful lump in the top of my left buttcheck about an inch under my tailbone. At first i thought it could be a Pilondial cyst but it has no opening or anything. Its very when im trying to sleep and i only got it today. Any idea what this could be? Doctor: thanks for sharing your health concern with us!well, it is just a sebaceous cyst or a neurofibroma and as well could be a pilonidal cyst/sinus as you mentioned! never poke it as this may invite infection!an FNAC test could confirm it. all the best!