Bad Although face-lifting needle has many advantages, the side effects of face-lifting needle exist, the most common ones are bilateral asymmetry or muscle weakness at the injection site. The side effects of face-lifting needle are related to the doctor's experience, and the dose of injection is related to the injection site. Some unqualified "beauticians" in life beauty salons often have drooping eyelids, drooping eyebrows and local swelling because they are not familiar with anatomy, the injection site is not allowed, or the concentration and dosage are too large. If you hit your face too much, you may have difficulty swallowing. Therefore, it must be operated by a professional cosmetic doctor to ensure the safety of the documents. In addition, the face-lifting needle injects botulinum toxin into the fat part of the muscle, so that the muscles there relax and atrophy, and the masseter activity decreases and the atrophy becomes smaller. However, the face-lifting needle will fail after half a year and needs to be re-injected. The injection effect is not 100%. After several injections, a few people will produce antibodies to the face-lifting needle, which will lead to the ineffectiveness of future injections.