Drooping corners of the mouth are quite a common cause of a sad, tired-looking face. When you’re young, you’re lips are beautifully red, well-hydrated and supple. As we get older, our lips become less filled. Sunken corners of the mouth and small wrinkles running from the corners of the mouth down your face give the appearance of a sad face and even an excellent make-up will not be able to cover that up. Filling and lifting the lip corners with hyaluronic acid will bring back a cheerful look to your face.