וישב מחוץ לאהלו שבעת ימים (מצורע יד:ח)

Chazal say that the metzora must go outside the camp as punishment for holding himself in high regard and therefore must distance himself from people.  If so, why does he also need to go outside his home when he cleanses himself? The Gemara (סוטה ה) says “מאן דיהיר אפילו אאינשי ביתיה לא מתקבל” – a Baal Ghava – a haughty person, isn’t even accepted by his own household.  Therefore, the mtezorah is punished with tzaras because of his haughtiness and must sit outside his own home, as his own family despises him.