Hello dear patient, the pain you are feeling in peri anal area can be due to abscess formation as you suggested. I would advice you to get a consultation with surgeon. And also a ultrasound to confirm if it's a pus collection or something else like mass. You need to take high Fibre diet. Also take 3 teaspoon of lactifibre mixed with water daily in night time. It will make your stools soft and decrease pain due to compression. You can also take tab brufen 400mg SOS for pain. Tc