A little information about lycanthropy or becoming a werewolf in Skyrim. Becoming one: Start the Companions questline. Soon you will get a quest that says to retrieve a fragment of Wuuthrad, Farkas will go with you on this quest. There comes a part early on, once you are in the cave, to enter a chamber and pull a lever. Make sure Farkas is NOT in the chamber with you other wise you're screwed. You will become trapped in the chamber, forcing you to watch an exchange between Farkas and a group of werewolf hunters called "The Silver Hand". They talk about killing Farkas and move towards him. Farkas then transforms into a werewolf, killing them all. He releases you, and you can question him about the werewolf thing. Unfortunately Farkas is "dumb", and doesn't tell you much about it. Finish the quest and return to Jorravskr. Soon after this you will be given a quest about going to the Underforge. Once you enter Skjor, and Aela(in her wolf form), will be there. Skjor, will cut Aela's wrist, letting her blood flow into a basin. Once it is full, activate it, and you will become a werewolf. (There are still many quests in the Companions questline) Info: To access your werewolf ability, first go the the "Magic" section in your menus. Go to the "powers" sub section. Select "Beast From". This assigns it to the same button/key as your shouts. You will eventually, transform back into a human, after a certain amount of time without feeding. To "feed" you must kill a humanoid, and when you approach them you will be given the option to "feed" instead of looting the bodies. This will work on witches, any human, elves, and orcs. Khajit and Argonians as well. It will not work on any animals. "Feeding" will extend the amount of time you are in werewolf form. When you eventually transform back to a human, you will have nothing equipped and it will give a little message that says you are carrying to much to run. This is a glitch. On a side note silver does do more damage to you, beware of transforming to fight Silver Hand. It also takes a while to transform, so don't do it in the middle of combat. And again a side note, when you sprint as a werewolf you are faster than sprinting on a horse. The Cure: Eventually you will get a quest form someone important in the Companions (sorry, sorry I don't remember his name) telling you he wants a way out of lycanthropy. he will tell you about how the Companions became werewolves hundreds of years ago, when the Glenmoril Witches helped the ancient Companions. He will tell you to get him one of their heads. I recommend only getting one, instead of clearing them all out, this will be helpful later if you want to cure yourself. After you complete the rest of the Companions questline and cure the old important dude of werewolfism, you talk to Farkas about curing yourself, He will give you the quest purity, which involves Glenmoril Witches heads. Return to the cave where you first got the head and gather one more. Complete Purity. Hope I helped you! Give me a like or a reputation point if you want more!