Thank you for the query.
Please note that you are unable to tell if you have hemorrhoids or not without rectoscopy. Usually hemorrhoids are invisible as they are hidden inside the anus. So you can have them and not know about it.
And chronic anus itching is usually caused by hemorrhoids or (if the itching appears mostly in the morning) by pinworms
I suggest you to visit your doctor, have rectoscopy to see if there are any hemorrhoids or not. In case of lack of hemorrhoids, pinworms test should be done.
Hope this will help.