Hi. Recently while showering (after sitting on the pot) I noticed that there was a lump inside my buttocks, very close to where the anal opening is. It is quite hard and initially only hurt when I apply some pressure on it, but now while not very painful is noticeable throughout. I can also feel some bony or veiny structures around it. I don't think it's anal or colorectal cancer as I'm only 22, with no direct family history of cancer and show none of the symptoms, but I'm worried that it might be skin cancer or something else that's serious. I don't smoke or drink (but admittedly do have a lot of chocolate and fizzy drinks, and not much fruit except fruit juices) and I don't have beef regularly. There are no signs of bleeding and my bowel movements don't seem to be much different. I have no idea how long it's been there, but I only noticed it yesterday. Is this something that will go away or is it necessary to see a doctor (I'm currently job-seeking and am not insured). Please advise. Thanks