It's carpet beetle larvae. At least I have all the same symptoms. Read my long post.
My son, sister, and I had scabies which we got rid of using ivermectin. I was left with a crawling, biting, and itching issue in my hair. While scabies typically doesn't get into the hair - I believe mine did and left a bacteria/virus behind in my hair follicles. Several doctors saw nothing. My hair started falling out and I would get burning, itching scratches appearing on my shoulders and back (where I could not reach). It went on for 2 years - it was horrible. I shaved my head (and I'm a girl), and changed sheets every day...doctors told me I was crazy.
I'm a chemist - who has run huge laboratories so I didn't believe that lie.
Instead, I started making various types of treatments to help. And FINALLY, this worked.
I am NOT a doctor - and not giving advice - this worked for me to eliminate my problem.
1000 ppm Silver Collodial solution - 1 liter
1/4 cup of coconut oil
3-7 drops of Dawn dishwashing soap (to emulsify oil and water)
The Silver killed whatever it was, the coconut oil got the solution below the skin (hair follicles are notorious for getting a solution into...) and the soap mixes everything together.
Sprayed my hair for 10 days (2X per day) - and GONE! No more scalp issues, no more scratch lines - relief. It's now been 2 years since that horrible ordeal. My hair has grown back - but what is interesting my very curly hair is now straight. I'll take that although I loved my curls.
Good luck everyone - you're not crazy, there is something going on. If this helps one person with this issue I'm happy.
We are having the same problem. Do you get rid of it and how?