The interval between face thinning injections, in general, in 5-6 months. Face thinning injection also refers to the bite muscle local injection of botulinum toxin, which is more commonly used as a cosmetic method, the injection is generally effective in 2 weeks, 1 month to achieve a natural and stable effect, while the single treatment maintenance time is about 5-6 months, so for the beauty needs of the population, the need for an interval of 5-6 months to re-injection. The main mechanism of face thinning injection is to locally inject botulinum toxin to block the transmission of nerves, so that the local muscle paralysis, so as to achieve the purpose of face thinning as well as cosmetic purposes, the injection of local skin may appear swelling, bruising and other adverse reactions, in order to ensure the therapeutic effect as well as to reduce the adverse reactions, be sure to choose the regular health care institutions for treatment.