Hand trembling when a patient has a cold is usually caused by the following diseases: First, the clinical symptoms and manifestations of hand trembling and hand trembling are stimulated by viral colds such as high fever, when inflammatory factors in the body release mediators that stimulate the vascular endothelium, such as leukotrienes, prostacyclin and other substances, resulting in the stimulation of the nerve endings and causing hand trembling. Secondly, hand trembling is often caused by a transient hypoglycemia that leads to hand trembling, hand trembling, which is accompanied by clinical symptoms and manifestations such as palpitations and cold sweats. Thirdly, hand trembling when you have a cold is also related to the endocrine environment, which can lead to thyroid insufficiency or adrenal dysfunction, which can also lead to hand trembling.