Conversation: The conversation between human and AI assistant.
[|Human|] I have a lump on my lower back right above my butt crack, it dosent hurt when I bend or sit but it hurts when I lay on it but only on hard surfaces. No puss comes out of it and its not red, It has gotten bigger since I had kids and gained weight, it does hurt when I press on it.
[|AI|]  Hi! Thanks for giving me another opportunity to discuss some early lumps in the posterior midline of our body; as this is common, generally in pediatric age group and do not disturb a persons' health! Anyways, what are these? Yes, these are benign; not infective, not cancer and not going to kill you but will cause cosmetic problems, physical inconvenience and fear of getting hurt/infected there... These could be some congenital cyst like Desmond/epidermal cyst, lipoma, neurofibroma or a skin fibro-epithelial polyp/skin tag...!Therefore, get to your surgeon for a direct examination, tests if necessary and to relieve your concerns!regards,