Hemorrhoids are defined as in Dorlands Medical Dictionary:
A Varicose dilatation of a vein of the superior or inferior hemorrhiodal plexus, resulting from a persistent increase in venous pressure.
There are 4 types:
External, internal, combined, and thrombosed.
Thrombosed means there is a blood clot blocking the vein or that the vein has ruptured and there is a blood clot in the surrounding tissues. This is very painful.
The best way to avoid these is to eat enough fiber, drink alot of water, and dont spend alot of time sitting on the toilet. Get your business done and dont push to hard.
Hopefully yours will shrink up and not be a problem. If they become to large, or bleed frequently there is surgical correction.