I had yeast infection also after having a reaction to the nitro I actually had a blister in the area, the itching can be as bad as the pain and spams, or a mix of all.
If you still think you have a yeast the sitz bath can make it worst so be careful .
Perhaps taking some probotics will help with the yeast, I like to take Kefir is like drinking yogur.
My CRS also in my later discussion about surgery said he will not touch the skin tag, he said it was just skin.
Again so sorry you have so much trouble and side effects from the fissures.
It seems you are soo irritated from the fissures, treatment and creams, beside the yeast, on Cauterization means burning so is understandable that the skin be red and tender.
The discharge you have, keep an eye on to make sure you don't develop an infection, you should call your doctor if you are not comfortable with that.
My prayers and well wishes are with you.
