Anusol is a medication used to cure or prevent itchiness around the anus. However, sometimes, this medication can also be the reason why you have to scratch your anus. If you have experienced this, you may be wondering why. Well, the answer is not so complicated, it is simply because you have overdosed on the Anusol dosage and you are suffering from the side effect. You are expected to use the Anusol suppository at least 2 to 3 times daily.