My trapezius muscles are bulging and make my neck look short; inquiring about trapezius Botox.

Because I usually have bad posture when looking at my smartphone or computer, my trapezius muscles have become prominently raised, making my shoulder line uneven and my neck look short. I also suffer from severe stiffness in my shoulders, and since it's summer, I get really self-conscious when wearing off-shoulder tops or sleeveless dresses!

I would like to inquire about the dosage and specific procedure for Maypure trapezius Botox. Although it varies by individual and body type, I would like to know how many units are typically required to see a slimming effect, and when the actual changes in body lines become visible after the procedure!

Also, I would appreciate it if you could explain the precautions regarding how many days I should avoid excessive exercise or using saunas, aside from light washing and showering on the day of the treatment.