Hmmm...I don't know what to say about the anal fissure & DE. I would procede cautiously. I doubt the DE would have any effect on hemorrhoids tho.
If you are doing parasite cleansing you can get constipation no matter what you use. It helps to do enemas. They also help show what parasites are being.
2 cups of water at a time only per bag, to not interfere with the good bacteria, & add yogurt w/acidopohilus to the last bag, plus eat some of it daily. (Not too much eaten, as it can cause constipation too.)
Cascara sagara can be helpful for the constipation too.