Hi Wendy, it sounds like you have a fissure. The broken glass analogy is one used a lot when talking about the pain from fissures. I personally have not experienced this, but I think if you use any cream with zinc oxide in it should help. My personal favorite is Ilex paste. Use wet wipes or better yet a bidet, instead of toilet paper. You can buy a portable bidet on Amazon pretty reasonably. Or a sitz bath can also be a good idea. Fill it with as hot of water that you can stand and just sit in it for a bit. Can also be purchased on Amazon. Maybe stay away from acidy or hot spicey foods for a bit would be a good idea also. Tomato based foods, jalapenos peppers etc. That's all I can think of for you now. Hope get some relief soon.
Aimee