Where would he have picked up scabies, and why does he think he has them? You don't pick up scabies from casual contact, and they're really not that common. He should certainly have that confirmed by a doctor before anyone gets treated.
I have no idea. I'm guessing he's basing this on Dr. Google. I ordered him to go to urgent care tonight so hopefully we'll have an answer soon. We won't treat anything until we know for sure.
My guess is that if he has it, he picked up when he was getting chemo back in October. He spent a lot of time sitting in a chair at the cancer center and if someone had scabies and had been in the chair prior to him he might have got it that way. Other than that, I have no clue how he could have picked it up. I'm hoping it's just another bad case of poison ivy.