Uneven recession with Folliculitis Decalvans

So I’ve been losing hair only only my left side of the hair line. And its gone pretty far back compared to the right. No sign of stopping. But one thing I learned was my scalp would hurt when I moved my hair and thats where I was losing hair. So where every it hurt, when I moved my hair, thats where it was thinning and I was losing hair. So why is that? and why am I still losing it.