Face slimming injection can not achieve the effect of permanent face slimming, the principle of action is to reduce the movement of the bite muscle, the general effect lasts 3-6 months, 6 months after the bite muscle will resume the bite force, the drug effect is metabolized, the slimming effect will disappear, the phenomenon of rebound, but compared to not injected before will be better. After repeated treatment, may extend the effect of the slimming needle, and even last a year to a year and a half, but ultimately not a permanent slimming face, candidates should recognize this. After the injection of facial slimming needle, in order to achieve better results, candidates need to pay attention to the following matters: 1, 24 hours can not take a hot bath, sauna, can not go to a seriously polluted place; 2, 1 week, can not eat too hard, stimulating things; 3, the quality of facial slimming needles on the market vary, candidates need to go to a regular hospital for treatment to avoid adverse reactions, affecting facial beauty. In addition, the thinning of the face needle only for the bite muscle hypertrophy is useful, not everyone is suitable for playing the thinning of the face needle. The beauty should choose a regular hospital, by a qualified physician to operate, to avoid adverse reactions, affecting the beauty.