Hello,
Hemorrhoids are varicosities and inflammation of veins in the rectum and anus.They are caused and increased by increased straining during bowel movements, by constipation or diarrhea,hypertension,obesity, excessive consumption of alcohol or caffeine and portal hypertension.
Give plenty of fiber in the diet and ask your fiancé to avoid dehydration by drinking plenty of water and fruit juice.Also ask him to get plenty of exercise as this helps keeps the bowels regular.Excessive consumption of caffeine and alcohol also has to be avoided.
Also since a lot of pain is there,so it can be strangulated or prolapsed piles.I feel that early intervention by a surgeon is mandatory in that case.
Hope it helps.Take care and pls do keep me posted if you have any additional queries.
You need to find a better doctor. The ER is a good place for emergencies, and I know he is in pain, but try to get in with a regular Internal Medicine doctor for regular visits and soon. If they need him to see a specialist, they will arrange it. If they can take care of it, again, they will. In the long run, the care should be more well handled and more cost effective. I'm so sorry. Sometimes people 'poke' fun, but the term 'pain in the behind' isn't dubbed that for no reason.
Good luck and please keep us posted. Pictures not necessary. (LOL)