Itching has to be the worst part about hemorrhoids. It makes it difficult to walk and to sit. The best remedy I've found is hemorrhoids cream containing aloe vera. I'm sure the ones with witch hazel are good too. Actually my wife had used witch hazel wipes when she suffered from constipation and hemorrhoids when she was pregnant. She said that they were effective.
I've never used witch hazel but I've gotten good results with ointments containing aloe vera gel. Aloe vera is extremely soothing and calming. It also has a slight cooling effect. So it works great for the pain and itching associated with hemorrhoids. I have no idea if pure aloe vera gel can be applied, but I think that would probably be okay as well.