Lips can be improved in appearance to give maximum possible beautification in balance with the rest of the facial features by non invasive means these days.
Lip augmentation (increasing the thickness of red lip) is performed by injecting facial fillers of semi permanent natures. These are liquid implants that the body tolerates without problems and are disintegrated by the body slowly over the period of one to 3 yrs depending upon the material used.
It's perfumed on patient basis where one can go to work immediately and no anesthesia of nay kind is need.
More permanent method is to combine it with surgical reshaping .In which case it is done under local or general anesthesia and one can go home same evening.