Why are the corners of my mouth so puffy?? I'm only 22!! (photos)

Puffiness of an small area next to the corners or the mouth, not associated with significant puffiness of the lower face could be secondary to sogginess of the lower face skin due to poor cheek bone projection. If by lifting the skin face at the levels of the lateral cheek this physical finding improves, that demonstrates the lack of cheek fullness might be the cause.Cheek augmentation could be addressed in the office with soft tissue fillers like voluma ( that last for 2 years) or with surgery by placing cheek implantsPatients interested in improving the fullness of the face close to the corners of the mouth  should make a consultation with a Board Certified Plastic Surgeon specialized in plastic surgery procedures of the face

Everyone has slight differences in the distribution of soft tissue in every part of the body. Assuming the area you're referring to has been that way for a long time, it's probably a small pocket of fat. Very localized liposuction can usually be used to shape areas like that.