I've been to four dermatologist and 3 physicians. Not one did a biopsy. I'm trying to get an appointment with infectious disease specialist. I went down the rabbit hole on the internet. I have the same symptoms as you and then some. Mine has spread to my chest and back. I'm on oral Ivermectin it is helping. I now use straight tea tree oil on my scalp. The tea tree oil had these jelly like things come out of my scalp. I go back to the dermatologist this week. Best of luck combating these mites.