I have a pain in my anus. I cannot clench my anus because it hurts tremendously. Scared of going to the toilet because it pains when I try to have a first bowel movement. Can't sit due to the pain. Lying down is the most comfortable. Walking hurts for the first ten minutes and I feel a kind of pressure on my anus but after that it gets a little better. No blood in stools. No external signs of any lumps. Apart from the pain it feels a little like something is poking inside. The posterior edge ie away from the scrotum feels a tight and a little hard. Pushing on it hurts a lot. What could this be? I am 42 years old and 70 kg. Not obese but rather sedentary. Thanks for all the help.