When I had my epi, the hospital gave me an inflatable ring to sit on - they use it for patients with really bad piles apparently, but sitting on that did help as there was no direct pressure in that area. I found them to be worse after a few days when it had started to heal and the stitches started to pull. To help alleviate it, I had a 'sitz' bath, which is basically a bath in warm salty water and made sure that I splashed plenty of water on the vuh-jay-jay. I also had a cold pack that I would sit on too.