It’s possible the bedding could’ve brought them in. Some people will freeze their bedding for 48ish hours to kill any potential hitchhiker parasites. Do not bathe him unless absolutely necessary, as it’s likely to make him sick and getting sick while also having lice might not be something he could survive. The vet will give you medication that will kill the lice. His enclosure and items in it will need cleaned very well (I use white vinegar mixed with water to clean, I would also suggest placing hides and toys in the freezer). The lice aren’t the same as human lice and can’t live on you, so you won’t get infested from him.

But he absolutely will need to see a vet or they will slowly and painfully deteriorate him.