What's a fast way to take care of loose skin on thighs (from weight loss)?

Exercise: Can help firm up the muscles underneath the skin, but the only way to actually get rid of the excess skin is through surgery.

Surgery: Unfortunately there is no diet or exercise that can "tighten" skin. You can reduce fat volume and increase muscle mass leading to better tone and definition, but if you have excess skin that needs to be corrected surgically.