The folds of bitterness are wrinkles that start from the corner of the mouth and descend towards the chin, the worsening of which is gradual and inevitable.
These are the wrinkles that age the face and give an air of bad mood.
The appearance of the fold of bitterness is multifactorial:
- The contraction of the facial skin muscles, especially the DAO muscle which pulls the corners of the lips downwards.
- Skin sagging and infero-internal ptosis of internal fat.
- The loss of support by the fat that melts at the level of the labial mouth, and bone aging.