Scapular muscle tremor may be caused by overwork, localized cold, infection and so on. 1. Overwork: because of long-term scapular area weight bearing, or often lifting heavy objects, resulting in local muscles in a state of long-term fatigue, chronic strain of the surrounding soft tissues, which can trigger the soft tissues of the scapular area of twitching and trembling. 2. Localized cold: after the scapula is cold, it can lead to local vasoconstriction and muscle spasm due to cold stimulation, and involuntary contraction and trembling of the scapular muscles can occur. 3. Infection: it is mostly seen in the infection of small wounds, especially when the phenomenon of pus cavity occurs, which can easily lead to the throbbing of the soft tissues around the scapula, accompanied by obvious pain and redness and swelling. Scapular muscle trembling may also be caused by other reasons, should go to the hospital in a timely manner to identify the cause of targeted treatment or treatment, usually should avoid excessive exertion.