Question

I have intense itching around my anus; it's extremely embarrassing, and my wife complains when I scratch at home (not surprisingly).

I don't have hemorrhoids or anything else wrong, as far as I know.
 

Answer

Also called pruritus ani, anal itching has many causes. Numerous factors can cause it to be more intense, including moisture, the abrasion caused by clothing, and the pressure of sitting. Anal itching is usually most noticeable and bothersome at night or right after a bowel movement. Anal itching is a common problem that most people have experienced at one time or another, although not always intensely. Don't be afraid to talk with your doctor about it. With proper treatment and self-care measures, most people can achieve complete relief. You can read much more about anal itching at the links below, which may assist you in consultation with your doctor.
 

Related Links
MedicineNet: anal itching
eMedicine Health: anal itching