Escharotics can cause serious scarring and damage to normal skin. It may also cause inflammation of the lungs that can result in lung scarring. There is little evidence that vitamin E helps with keloids or scarring. Narrowing of the airways occurs due to inflammation and scarring within them. Excessive exposure can cause chemical burns resulting in permanent scarring. Finally, the lesions develop extensive scarring and/or atrophy, as well as pigment changes. Abdominal surgery always results in some scarring of the bowel, called adhesions. Some of these diseases cause fibrosis, scarring or honeycomb change. Laser therapy is painful, requires anaesthesia, and has risks of scarring and dyspigmentation. This led to major complications such as vocal ligament scarring. A small ulcer may also form with some scarring after healing. This can lead to scarring (fibrosis) and cirrhosis. This can result in infection and permanent scarring. Exposure can lead to serious chemical burns and permanent scarring. One involves putting quinacrine in the uterus which causes scarring and infertility.