What to Do If Wudu Breaks during Tawaf
Some scholars view that wudu is not essential in tawaf. This is the view favoured by Ibn Taymiyah (may Allah have mercy on him). So if wudu breaks during tawaf, you do not have to go out to do wudu. Tawaf is not valid if done inside the Mas`a because the Mas`a is outside al-Masjid al-Haram.