This is my first time getting trapezius Botox. I would like to inquire about the effects, duration, and precautions!

Hello. I am writing to inquire as I have been considering trapezius Botox to refine my shoulder line and alleviate stiffness and pain. I would like to try it myself because many people around me have reported great results, but I have a few questions. First, I would like to know when the effects typically appear and approximately how long the results last. I would also like to know if there are any specific precautions I should take, such as pain, stiffness, or side effects that could interfere with daily life. How are the dosage and costs usually determined? Additionally, I would appreciate it if you could advise on any stretching or maintenance tips I should follow to maximize the effects. I know you are busy, but I would be very grateful for a detailed response!