Aphthous lesions, popularly known as mouth sores, are actually mouth ulcers characterized by painful itching and burning sensation. The most common forms are minor aphthae smaller than 1 cm, characterized by an inner white part.

It spontaneously disappears within 2 weeks. Biopsy is beneficial for lesions that last longer than 4-6 weeks. In painful processes, laser therapy provides significantly more effective results than drug therapy. While painkillers and corticosteroid pomades are used in traditional treatments, nowadays, faster and more effective results are obtained with Nd:YAG laser and Er:YAG laser treatments.