While botulinum toxin (commonly known as Botox) is widely recognized for its effective facial slimming results, some individuals experience facial stiffness post-injection. This adverse reaction typically stems from improper injection technique, including incorrect depth, dosage, or placement. So how should one address this issue? Let's explore the details today.
I. Six Key Factors Causing Facial Stiffness After Botox Injections
1. Normal Reaction Following Proper Administration
After Botox injections for facial slimming, weakened masseter muscle strength may lead to unnatural facial expressions. This is a normal injection reaction. Such unnatural expressions may first appear within 24 hours post-injection, with peak effect occurring 7-14 days later. Expressions typically return to normal within 2-8 weeks.
2. Improper Botox Injection Placement
When administering facial slimming injections, the doctor must precisely target two points on one side of the face: The first point is located at the most prominent part of the masseter muscle (confirmed and marked after observing both clenched and relaxed jaw positions). The second point is positioned diagonally above the first point, at least 25px away.Deviation at either point causes abnormal facial stiffness lasting over 8 weeks.
3. Injection too superficial
Effective facial slimming requires injecting botulinum toxin into the masseter muscle. If the doctor lacks precise anatomical knowledge and injects the toxin into the superficial layer of the muscle, it may damage facial nerves. This can cause abnormal facial stiffness, commonly manifesting as drooling, a crooked mouth, or involuntary twitching at the corner of the mouth.
4. Excessive Botox dosage
In medical aesthetics, injections under 100 units per session are generally considered safe. For facial slimming, the total dosage for both masseter muscles should not exceed 100 units. Exceeding this limit may prolong abnormal facial stiffness beyond 8 weeks.
5. Insufficient interval between injections
To ensure optimal slimming results, multiple Botox treatments are possible, but each session must be spaced at least one month apart.
6. Massaging the injection site after Botox treatment
After Botox injection, doctors typically advise against manual massage. Massaging can cause the Botox solution already in the masseter muscle to spread into adjacent facial muscles, exacerbating unnatural expressions. In such cases, it may take longer than 8 weeks for facial expressions to return to normal.
II. How to Prevent Facial Stiffness After Botox Injections?
1. Always receive Botox injections at a reputable hospital by an experienced physician. They can accurately assess your facial muscle size and determine the appropriate Botox dosage, ensuring safety and minimizing the risk of facial stiffness.
2. Mild redness and swelling at the injection site typically subside within hours. Some individuals may experience slight bruising, which also resolves quickly.
3. Avoid lying down for 4 to 6 hours post-injection to prevent toxin dispersion.
4. Refrain from washing your face, applying makeup, touching the injection site, or exercising for 6 hours.
5. Avoid hard-shelled foods for one week. Abstain from spicy foods, seafood, and smoking/alcohol consumption for one week.
5. Avoid hard-shelled foods after injection. Refrain from spicy foods, seafood, smoking, and alcohol for one week.
6. Do not massage the injection site to prevent Botox diffusion.
7. Avoid facial massages, hot compresses, or rubbing for one month post-injection.
III. What to Do About Facial Stiffness After Botox?
1. Wait for the body to naturally metabolize the Botox; recovery typically occurs within three months.
2. Strengthening local chewing exercises may help.
If facial expressions appear unnatural, avoid massaging the area. Massaging can cause botulinum toxin solution in the masseter muscle to permeate adjacent expression muscles, worsening unnatural movements. In such cases, normal expression may take over 8 weeks to return.Doctors must strictly control the dosage, injection sites, and frequency of botulinum toxin administration to prevent facial muscle stiffness.
Important reminder: Seek treatment only at reputable medical aesthetic institutions with experienced practitioners to ensure safety and optimal outcomes.