Knocking with hard lumps a smile with depression may be caused by local muscle fiber damage or scar tissue formation after trauma, belonging to the abnormalities of local muscle morphology and function after trauma. This situation is prone to occur in the face, facial muscle structure relaxation, trauma caused by part of the muscle fiber damage rupture, the damaged muscle fiber contraction deformation, the formation of local hard lumps. And when the face makes a laughing action, the muscle fibers need to contract, the damage at the local fibers will leave a depression. Localized hard lumps and depressions affect the aesthetic appearance of the face, should be combined with their own specific circumstances to actively go to the plastic surgery to face-to-face examination, after a clear diagnosis can be considered to promote the dissipation of local heat therapy hard knots, and, if necessary, can also be considered minimally invasive surgical correction, do not treat privately, so as not to cause danger.