Muscle Relaxer for tight neck after Corset Platysmaplasty?

Hi. I am three weeks post SMAS and Corset Platysmaplasty. My neck is .extremely tight and it is difficult for me to hold my head straight without becoming fatigued or my neck and shoulders hurting...backward head tilting is particularly difficult. I am having muscle spasms that are tensing the muscles beneath the chin and neck. Would it be helpful to take a muscle relaxer for a couple of days in hopes of breaking the cycle if one exists? Thanks so much!