The worst symptom is an obtuseness, a sort of numbness.最糟糕的症状是没有明显的感觉，也就是一种麻木感。Most patients find that the numbness from the injection wears off after about an hour.大多数病人发现注射产生的麻木感在一个小时左右以后会逐渐消失。She massaged her leg until the numbness was gone.她按摩她的腿，直到麻木感消失。