Botulinum toxin needs to react with muscles within two weeks after injection of face-lifting needle. By relaxing and stretching muscles, the masseter muscle is inactive. At this time, if the root is clenched, the masseter muscle will feel bloated and stiff. This is normal, because botulinum toxin is working, which means it is effective. The situation will be gone in two weeks, so don't worry. But in the meantime, try not to overuse the masseter, chew hard food, and don't bite your teeth to see the face-lifting effect. This is a process that requires patience. I'm definitely not saying that my face lost weight the next day after I got a face-lifting needle today. Stay calm, relax for two weeks, and then see the effect. Usually after four weeks, I will see a very obvious effect. You can compare the previous photos.