I can tell you why the RED potato with peel works for hemorrhoids.
There is a chemical compound in the peel of a red only potato that causes the blood vessels to constrict, they shrink and pull back internally where they belong, this works very well.
It is well know in my country of origin that if you peel a small potato and use the center of it to make a suppository like shape and insert it in your anus, you will cure internal hemorrhoids. I saw how it cured a close friend of mine back then.
To all those who suffer with hemorrhoids, I have felt the pain. Two years ago I stopped mine completely. I read an old Voortrekker health book written by a minister. Low & behold The sweet potato.
Make sure outer area clean not peeled. Cut into pencil length & width, insert into anus, quite painful to start. I used some coconut oil/witch hazel to help insert. What a cure. I hope this helps all of you suffering out there.
Ukranian village cure for hemorrhoids:
I had a very bad case of hemorrhoids and my wife at the time was from the Ukraine. she advised me to take a fresh potato, grate it with a potato grater and to press the grated potato onto my hemorrhoids. I did this for 3 days and my hemorrhoids were gone, the juice from the potatoes will shrink the hemorrhoids a fresh potato must be used each time. This does work!
Remarkable relief from hemorrhoids by using a raw potato. Cut a slice and shape into a suppository, coat with a tiny bit of vitamin e, then insert. (If potato is chilled - even better!) Retain as long as possible, sleep with it if you can. Keep putting a fresh suppository in after every bowel movement. Use for a couple of days and you will be pleasantly surprised! Don't know why it works, but it does!!!