question: Hi I have had a hard lump just under my left bottom cheek for several years, it was dark brown in colour, firm to to touch but not painful. When i sat down on it however it was excruciating. In the last few years the pain has gone so i haven t worried about it anymore but today i noticed the skin there is softening and becoming concave. I can feel a dip if i run my fingers over it. Do you know what this could be?