I'm assuming the new giant is made out of materials and mechanics that can support the weight and dontdon't cause problems with the person itself. Otherwise her bones would break more easily (not guaranteed, depends on how much of a giant she is) and she would overheat like crazy (less surface area to lose heat compared to the volume that generates heat).
Liquids have less cohesion. Think of a droplet of water on a leaf, you wontwon't see that kind of thing when you are big as the water would pool more. BloodlossBlood loss will also be much worse, as you'll lose a lot more and the flow rate will be higher, making it harder for the blood to clot and seal the wound.