I gave birth 10 days ago and have a lot of itching in the anus. Before giving birth, I also had an itch, when I touched the anal opening, I found that there were blisters stretching along the folds of the anus. I went to the toilet and didn't see any blood. When I gave birth, the doctor at the obstetrics hospital said that I might have hemorrhoids, but after 1 month of pregnancy, I would go back to the doctor if the itching persists. So the doctor asked me to ask if anal itching, anal hole with blisters is a symptom of what disease?