The goals of reconstructive surgery differ from those of cosmetic surgery. Reconstructive surgery is performed on abnormal structures of the body, caused by birth defects, developmental abnormalities, trauma or injury, infection, tumors, or disease. It is generally performed to improve function, but may also be done to approximate a normal appearance.

Burn wounds, lacerations, growths, and aging problems are considered acquired deformities. In some cases, patients may find that a procedure commonly thought to be aesthetic in nature may be performed to achieve a reconstructive goal. For example, some older adults with redundant or drooping eyelid skin blocking their field of vision might have eyelid surgery. Or an adult whose face has an asymmetrical look because of paralysis might have a balancing facelift. Although appearance is enhanced, the main goal of the surgery is to restore function.