I Had 3, what I thought, were insect bites. the itch was incredible. went to a dermatologist & she prescribed cream, Permathrin Cream. I used as prescribed 3 times over a 6 week period. But, it did not work. I have a printers loop & kept an eye on my skin. The lesions had tiny white larvae & bugs were present & plenty. The doctor did a biopsy for scabies but it was negative. She said just let them heal. Well, they're still active & are forming white lines on my arms & sometimes they swell. i'm at my wits end. can someone help?