I have a habit of biting the inside of my lips ...

Hello, doctor, I've been noticing a mania that irritates me a lot ... I bite the inside of my lips (cheeks and lower lip) until I bleed, and suck that blood, and when it's over, I'll be back to bite until I bleed again ... the problem is that I do it while I sleep, and when I realize it, my mouth is already bruised, and the worst thing is that even when I realize what I'm doing, I insist on continuing only by feeling (I think I like the taste of blood, I feel strange about it). Since when I was about 10 years old, I did it, only I was awake. Can it be anxiety? Do you have "treatment" for this, type homeopathy? Because if it depends on my willpower, it does not work, since I do it while I sleep ...
Expert answer:

Well the answer is already in the question, of course as I studied homeopathy I will suggest homeopathy because I think it will really help you, however any treatment for your disorder, even if it is allopathic.