I have been getting it for 11 years.. Although square jaw botox is very common , the results of all the doctors who treat it are not the same. Some hospitals disappear down to the cheekbones and become like Munch's scream, some hospitals don't work even after waiting for 3 weeks, so go back for an injection, some hospitals lose all of the effect in 2 months, and some hospitals have balm on both edges of the chin. One by one, only some muscles remain strong... ㅠㅠ It 's a cheap and simple procedure, and if it doesn't work, they inject it again for free (?), but both the doctor and I feel uncomfortable with each other. The doctor is very condescending and gives me the injection again for free, but I have to wait for the effect to say no, so the hassle and stress of having to go back and consult again!! It hurts..ㅡ,.ㅡ From my personal experience, I think that the results after the procedure were better for the directors who treat themselves at private hospitals than for plastic surgeons operated by chains. Those with a little more experience were better than the very young doctors.