Hello. Symptoms such as pain, sensitivity and headache usually appear after orthodontics. Generally, symptoms will be relieved after 3-5 days or a week, and it is normal for teeth to loosen, because each tooth has a certain physiological activity ability to buffer chewing pressure. Protect teeth from trauma. It is normal for tooth looseness to increase during treatment. If your condition is not relieved or aggravated, it is recommended to contact your attending doctor.