Unfriendly Doctor is an NPC residing in Home Town. He can be found at the Hospital. He can be interacted with, but not many players are brave enough to do so. If you interact with him, he will check your health.

But will always come to the conclusion that the Player is not sick, even if they have the Illness. He doesn't have any quests, and doesn't sell any items. The unfriendly doctor can also be found in the nurse's office Schools, but could not contact.