My son had this problem and he always left spots in his underwear. I mentioned this to his pediatrician, and after asking my son several questions, the doctor said the cause for this was constipation. I would/could have never guessed such but I think the doctor was right. just thought I mention this? Katrin
I would see a doctor, but I think you have irritated your anus too much. It is not meant to be clean, just wipe a few times and what ever you do, don't scrub it. Believe it or not the anus is incredibly sensitive and can easily be damaged.
You do not mention your age. With ageing, a nerve controlling the area may be less efficient. Stenosis could be problematic. There are medical specialists you could be referred to by your GP.
Idk, that sounds very weird... are u a female or male??