Does the antibiotics kill bacteria on the skin of the whole body or just the face?

Answer:
Antibiotics generally fight against all acne (back, arms, chest, etc…) , not just 'regular' acne.

That's the plus.

… on the other hand, it may get worse before getting superior.

Answer:
should do whole body unless its a cream applied to the face. but you could then apply it other places i guess