Herbs caused my scattering. I told my daughter I thought I had worms and she provided me with Phytofuge, a detox and elimination formula from her ND containing everything from Black-Walnut hull, Wormwood , grapefruit seed and every other herbal thing I have heard of for worms. I took it for 2 months and never passed a worm to my knowledge.
Immediately afterward I had worms coming from my stomach, feet, eyes, nose, you name it! Two years later I am still trying to get rid of these scattered worms. I've taken meds most of this time and have made progress, but don't know if I will ever win.
I won't tell my daughter that her help probably caused me all this trouble.
If you think you have parasites, for your own good DO NOT TAKE HERBS.