The 6th House Lord In 1st House naturally affects the first house badly. This means that the physical structure of the native can be weak and the health of the native can also be weak. If the lord of the first house and the house is weak and the lord of the sixth house is not properly placed in the first house then it can cause ballast. But if the lord of the sixth house is well placed in the first house i.e. in its exalted sign, its own house, friend sign then the bad effects can be reduced and the health of the native is good and strong and his physical structure is strong.