This animation describes what a bunion is and the one of the possible surgeries used to correct it, namely a metatarsal osteotomy.

A physician describes what causes acne to develop and how it can lead to facial scars. She also describes several acne scarring treatments including collagen injections, dermal fat injections, dermabrasion, and laser skin treatments. The doctor also describes the role of skin transplant surgery and skin grafts in acne scar repair.