I'm curious about the pain and typical effects of trapezius body Botox.

As my job involves spending long hours looking at a computer, I suffer from severe shoulder pain. My trapezius muscles are so bulging that it makes my neck look short, causing me significant stress. With my wedding approaching, I am seriously considering getting trapezius Botox injections. I have heard that a higher dosage is required for the body than for the face, so I am apprehensive about the pain involved during the injection. I would also like to know in advance if the stiffness persists for a long time after using my shoulders or going about daily activities. Additionally, how long does it typically take for the lines to become smooth and refined after trapezius Botox? I would appreciate a kind consultation on when would be the best time to visit for the injection to see the peak effect in time for my wedding.