Go to the doc and get checked out. It could be anything from cancer to an anal fissure.
Even if it’s not life threatening it will slowly get worse and the surgery to fix it if it does is one of the most painful experiences you can have. Better to address a hemorrhoid or fissure now using the various creams you can apply yourself rather than that.
I tried it out but I didn’t really like it that much. It seems to be good for most people though.