I work at a hospital and can confirm, most patients hair gets incredibly natted/tangled from not being able to get up for a good amount of time. We do try and use combs where I work to try and atleast keep hair, straight, clean and presentable. All depends on if the patient has any drains/leads on their head that could interfere. I hope you’re doing better now though and hope you can get it fixed. I wish they would’ve atleast tried to comb it out for you once or twice when you were there.