The lack of effect of a face slimming injection may be due to the lack of time of action, drug abnormality, injection site error, individual differences, and so on. 1. Not to the time of action: face slimming injection is mainly targeted at the facial biting muscle, biting muscle from relaxation to atrophy takes a certain amount of time, the lack of effect may be due to the time of action has not yet arrived. 2. Drug abnormality: drug failure, the wrong dosage, or the wrong type of drugs, etc., can also lead to the lack of effect of face slimming injection. 3. Wrong injection site: If the injection site is wrong, it will also lead to no effect of face slimming injection. 4. Individual differences: each person has different tolerance to face-slimming injections and there are individual differences. Although face slimming injection is very common, but in order to avoid the above situation, it is recommended to go to a regular hospital to inject face slimming injection, to ensure that the drug is regular, the dosage is reasonable, and the operation is proper.