They are perfectly normal people most of the month, but for a few days they turn into a real beast!
Our werewolves are the same here as they are in Harry Potter, so we're not sure how much information we can really provide.
Werewolves have a hard time finding employment and, unless they have the wolfsbane potion, they have no control over themselves in their wolf form.
In BTV there is no cure for lycanthropy, but wolfsbane makes it controllable. There are advocates within the Ministry of Magic to provide protection to those with lycanthropy from being fired from jobs due to their condition. There are also many brewers researching a cure.