Get High Frequency Machine on Amazon. It costs $45.00 or a bit more. It will help to kill whatever coming from your skin. Try to apply Permethrine cream after for some time. Do not afraid to use it. You can buy it without prescription. I had rush on my body and it helped to clear it up. Also Ivermectin is good for those kind of parasites or whatever it is.I found drug protocol of Ivermectine and Albendazol on curezone.
Hope you will get better.