After liposuction procedure liquefied fat or water may get collected in fat layer under the skin, It is named seroma. Seroma collection may increase further which avoids shrinking of skin to muscle also. And again, Seroma needs different kinds of treatment like aspiration by syringe multiple times.
A compression garment is a thick elastic garment made to fit tight but comfortable, dress to wear like undergarments. It provides pressure over the skin from outside to adhere with the muscle underlying the skin and avoid seroma formation
After wearing a compression garment seroma doesn’t form under the skin and skin takes the shape of the muscle underlying it so skin takes the shape of the underlying muscle.