I suffered a lot of pain postpartum from this uncomfortable condition with DD, and when I mentioned it to my new midwife this time, she warned me that I'd probably be getting them again later in pregnancy, and she recommended taking Horse Chestnut tincture as a treatment, to strengthen the walls of the veins. (Hemorrhoids are like vericose veins, within the rectum).
She was right on both counts. Hemmies came back, but the Horse Chestnut tincture WORKS!!! It has repeatedly cured me of discomfort and symptoms within a day or two after taking it. If I neglect to take it, my symptoms come back within a week. Then I just take it again, and they're gone in a day or two. Like clockwork!
Here's info about it, as well as some other natural treatments: