A weak chin appears smaller and shorter and causes the upper lip to appear larger and to protrude outwards. There is also lack of a clear chin to neck contour. Small chins can be a genetic trait passed down from parent to child or a congenital defect or due to injury or trauma to the jawbone.
A weak chin or a small jaw can cause problems with eating, speech and can affect self-confidence. A strong jawline is portrayed heavily in the media and is seen as an attractive feature for both men and women.
There are a variety of treatment options to alter the appearance of the jaw which includes dermal fillers, implants and surgery.