The Metamorphosis

When the change from human to beast occurs, the features blur and coarsen, the body and palms of the hand become covered with fur, the eyes redden and glow, the nose runs, the mouth salivates, speech is replaced by guttural sounds and the werewolf drops to an animal position on all four with its nails extended into claws. It gains accrued senses and the ability to locate his prey several kilometers away. The usual way for a werewolf to kill its victims is by biting through the jugular vein and feasting on the remains.
The curse of the werewolf
The lycanthrope is both the villain and the victim of his metamorphosis, for when he returns to human shape the remembrance of the foul murders he has performed while in the form of a wolf will continually haunt him.