Board Thread:General Discussion/@comment-32237043-20160626014030/@comment-32215633-20170606053447

Quoting someone else from tumblr:

Sans doesnt have only one hp, and that is canon prooven in the game! Actually, his MAX HP is Just one, but in snowdin there is this mini-hotel-house thing, and if you speak with monsters in here, they will tell you that if you sleep, your HP can go far above your max hp. Actually, you can stay in MTT hotel to make your hp go 10 above your max hp. And what does sans do his whole Day? He sleeps! + In geonocide run after you kill sans, your killcount doesnt change, suggesting he is still alive.