There are two types of causes: one is the local swelling of the injection immediately or on the same day after the injection, which is due to the piercing of blood vessels during the injection, causing local bleeding and forming a small hematoma; the other is the local bulging of the bite muscle area outward when clenching and grinding the teeth about 2 weeks after the injection, which is due to the uneven action of Botox on the bite muscle. For the former case, the candidate should immediately apply pressure to stop the bleeding and apply cold compresses when the local swelling is found, and the hematoma will disappear after it is absorbed in about 1 week. For the latter case, the candidate can wait for about 2 weeks, and the protrusion will be relieved after the muscle is evenly relaxed. If the latter case is considered to be caused by uneven injection, additional injections of 5~10U of botulinum toxin can be given to the bite muscle area with stronger muscle strength. Botulinum toxin injection into the broad neck muscle can achieve the effect of lower face lift, what is the principle? Due to skin relaxation, gravity and the pulling effect of the cervical muscle downward, the soft tissues at the cheek and jaw edge sag, giving an aging face. After Botox injection, the pulling force of the cervical muscle is weakened, and the soft tissues of the cheeks and jawline are relatively moved upward, thus achieving the effect of lower face lift. The contour line of the jawline will also be more clearly defined after the injection. How can I maintain better results after Botox bite muscle injection? Avoid chewing hard and tough foods, such as nuts, beef tendons, cartilage, sugar cane, etc., and avoid using the bite muscle to chew for a long time to avoid over-exercising the bite muscle. What are the risks of having a “face slimming injection”? One is the risk of botulinum toxin, it is a neurotoxin, there is a certain degree of toxicity and sensitization, but the probability of occurrence is very low; the other is the possibility of injection complications such as hematoma, bilateral face asymmetry, cheek depression, bite muscle protrusion, expression stiffness, etc. Why do I feel that my cheeks are sunken after having a “face slimming injection”? What should I do? This may be because the injection dose is too large, resulting in too obvious reduction in the volume of the bite muscle, causing the surface of the skin soft tissue sink; may also be due to the injection point is too high, near the upper edge of the bite muscle and the front edge of the cause. Therefore, the dose of injection should not be too large, the injection point should not exceed the line between the ear screen and the corner of the mouth, and the dose of the front and upper part of the muscle can be reduced appropriately when injecting. At which level of injection is the lower part of the face lift? Intradermal injection is more painful because of the large injection range and many injection points, so you can first apply lidocaine ointment on the surface of the skin within the injection range to achieve the effect of surface anesthesia before injection. What kind of effect can Botox injections achieve in the chin? Botox injection relaxes the chin muscle and can improve the cobblestone-like appearance of the chin, but there is a certain degree of decline in the chin muscle after relaxation, and there will be some visual lengthening. What are the possible complications of botulinum toxin chin injections? Diffusion of botulinum toxin into the descending labial muscle on the lateral superficial surface of the chin muscle or the orbicularis oris muscle above it will cause asymmetry of the lower lip on that side; diffusion into the orbicularis oris muscle will cause incomplete closure of the mouth and lips, drooling, and affect speech and eating.