I have this lump on the right side of my anus. It hurts with pressure on it and it's kinda freaking me out. I'm 16 so I don't know if that helps diagnose but please get back to me as soon as possible. There is no blood so I don't know about hemoroid.
It's possibly an external hemorrhoid, or a cyst, or a polyp. You can apply creams like Preparation H to see if helps to reduce the swelling. It's hard to diagnose online, so visiting the doctor would apparently be the best.