The stiff expression after face-lifting needle may be caused by these aspects:
1, normal reaction after normal operation
After injection of botulinum toxin, the muscle strength of masseter muscle is weakened, which will lead to unnatural facial expressions. This is a normal injection reaction. This unnatural expression can appear as early as 24 hours after injection, and the peak of action is 7- 14 days after injection, and the expression resumes after 2-8 weeks.
2. The position of botulinum toxin is biased.
Doctors are required to accurately inject botulinum toxin into two points on one side of the face when carrying out face-lifting acupuncture: the first point is located in the most obvious part of masseter muscle protrusion (confirmed and marked after observation in both gnashing and relaxing States); The second point is located diagonally above the first point and is more than 1cm away from the first point. Any deviation between these two points will cause abnormal facial expression stiffness, and this stiffness will last for more than 8 weeks.
3. Botulinum toxin injection position is too shallow
When using the face-lifting needle to face-lifting, the doctor must inject botulinum toxin into the masseter muscle to achieve the effect. If the doctor does not have a solid grasp of the anatomical level, injecting botulinum toxin into the upper muscle is likely to damage the facial nerve and cause abnormal facial expression. The common manifestations are drooling, crooked mouth and involuntary convulsions at the corners of the mouth, which may even last for several years.
4. Inject too much botulinum toxin.
Generally speaking, in medical beauty, it is relatively safe to inject botulinum toxin within 100 unit each time. When botulinum toxin is used for face-lifting, the injection of bilateral masseter muscle will not exceed 100 unit. If your doctor meets your urgent desire irresponsibly, your abnormal expression may last for more than 8 weeks.
5. The interval between two injections is too short.
In order to ensure a better face-lifting effect, botulinum toxin can be treated for many times, but the time for each treatment should not be less than 1 month. If you inject botulinum toxin crazily many times in a month, your expression will be unnatural. Unfortunately, your expression will last for a lifetime.
6. Massage the injection site after botulinum toxin.
After injecting botulinum toxin, doctors often tell you not to massage by hand, because when you massage by hand, the botulinum toxin liquid that has entered the masseter muscle will penetrate into the adjacent expression muscles, thus aggravating the unnatural expression. In this case, the expression will return to normal for more than 8 weeks.
In addition to these factors, the duration of facial stiffness after botulinum toxin injection is also related to the physical quality and masseter structure of beauty seekers. As long as you choose a regular medical institution, most beauty seekers don't have to worry about stiff facial expressions. But you probably can't tell whether your facial stiffness is caused by normal injection reaction or facial nerve injury, so you can choose to go to a regular medical institution when facial stiffness lasts 1 week. Finally, I would like to remind you that the face-lifting effect of face-lifting needle lasts for a short time, usually only 3-6 months. Therefore, you'd better not expect too much about the face-lifting time after the face-lifting needle.