The corners of the mouth can significantly influence one’s facial expression. When they are downturned, they can create an appearance of sadness or discontent, even when you’re feeling perfectly happy. This is often due to the action of the Depressor Anguli Oris (DAO) muscles, which pull the corners of the mouth downward. Luckily, Botox injections can effectively address this issue. Here, we explore the purpose and benefits of DAO Botox, the treatment process, recovery tips, and the longevity of the results.