Flushing clears out accumulated debris and helps the liver function more effectively, but one needs to modify one's diet and lifestyle for skin health to be restored.
Getting enough sleep, excercize, pure water and nutritious food is crucial. Your body needs fiber, protein and good fatty acids as well as lots of fruits and vegetables. These foods support healing and rebuilding of healthy tissue.
Flushing and cleansing remove the bad stuff, you need a good diet to put back the good stuff.