Bariatric surgery and its effects on the skin and skin diseases.

In light of the increasing prevalence of obesity worldwide, the popularity of bariatric surgery is on the rise. As with any other invasive procedure, these surgeries, especially with the obesity risk factor, carry the risk of direct cutaneous complications following the penetration and manipulation of tissues. In addition, bariatric surgery has an effect on skin structure and function. It also appears to be affiliated with several dermatoses. Some of these represent preexisting diseases the course of which is altered by the procedure, such as psoriasis. On the other hand, other skin disorders are triggered by the surgery itself. This article reviews and summarizes these cutaneous effects and complications.