It sounds like it could be pruritus ani (anal itching) and/or an anal fissure, which would be the source of your pain. What you have is debilitating, trust me, as I dealt with similar symptoms for over 3 years. It won't get better on your own and for whatever reason doctors don't seem to know about truly effective treatments. Don't waste your time on diets or expensive prescriptions...there's now an ointment called Pranicure that was created exactly for anal itching and fissures. Look it up and order online...if you're not satisfied (but I can almost guarantee you will be) you can get a refund. By far the best thing out there.
Hi, did the doc say you have hemorrhoids? If yes the itching is most likely caused by fecal material coming in contact with it. The rip needs to heal. There is a really great cream called Proctozone that your doc can prescribe. Its 2.5% cortizone cream and is a mircle cream.