Absolutely always sick- not uncommon to find him with an iv, wheelchair, or cane in the hallways. is admitted to the same hospital where papyrus is interning. Met grillby when he had to stay a few nights for a broken leg. after that, grillby visited everytime he could to visit sans, and they grew up together, and yet seperately. Has been admitted since he was a babybones, around 2. papyrus is overprotective of him