<s>[INST] I have a hard lump to the right of my left hip bone. Hurts to push down on. I recently had some lingering cramp pain in my lower stomach for 3-4 days. Almost like achy. I also had my period 2 days late this month for 7 days then had a period again 2 weeks later. I am on birth control but just started it again 2 months ago or so. Doesn t hurt to pee or anything and no stinging pain. I did notice after intercourse I smelt kinda off from my normal for about 1 week. Is this lump normal for girls? What is it? [/INST] Hi, thanks for sharing your health concerns with HCM!           If I were your treating Doctor for this case of hard hip bone lump, I would come up with three possibilities, these include: 1.     skin or hair follicle infection due to some friction injury 2.     The second possibility is of an ischiorectal abscess      3.     The last possibility is of some infected cyst or benign tumor / tumor like condition Overall, it is inflammatory and not worry about this!I suggest you to go for ice/cold compress in the region with local hygiene and take some topical antibiotics and wait for 2/3 day; if not relieved please don't forget to write to us again...Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health. </s>