Involuntary contraction of the soleus muscle is mainly considered to be caused by calcium deficiency, excessive exercise, exposure to cold and prolonged standing. 1. Calcium deficiency: Involuntary contraction of the soleus muscle is more common in women than in men, and mostly occurs at night. The symptoms of involuntary contraction of the soleus muscle are caused by calcium deficiency, and it is recommended to take calcium supplements, such as oral calcium gluconate and vitamin D. The symptoms of involuntary contraction of the soleus muscle are caused by calcium deficiency. More sunshine, balanced diet, eat more fresh fruits and vegetables. 2. Excessive exercise: a relatively large amount of exercise can easily lead to muscle and fascia congestion and injury, which can lead to involuntary contraction of the more involved foot muscles. 3. Cold: there is also a sudden change in ambient temperature, the impact of low temperature, emotional overstress, the foot muscle by the cold stimulation, involuntary contraction of the foot muscle. 4. Standing for a long time: It may also be caused by poor blood circulation due to a long time in one position. The foot muscles have a transient muscle ischemia and hypoxia, which can cause involuntary contraction of the foot muscles. If the phenomenon of involuntary contraction of the soleus muscle has not been relieved for a long time, it is necessary to go to the hospital in time to get a clear diagnosis and treatment. Involuntary contraction of the soleus muscle is mainly considered to be dystonia, including acquired dystonia and hereditary dystonia. Dystonia is an abnormally repetitive movement and abnormal posture caused by spastic contraction of muscles. 1. Acquired dystonia: dystonia can be caused by infection, brain injury, improper use of medication, trauma, etc. 2. Hereditary dystonia: It is congenital and usually caused by the causative gene. For example, dentate nucleus red nucleus pallidus globus pallidus atrophicus, brain tissue iron deposition neurodegenerative disease, Huntington’s disease and so on are caused by abnormalities of the genes on the autosomal chromosome. 3. Others: Pathologic changes in the nervous system can also lead to dystonia, and some causes are unknown. If any of the above symptoms occur, it is recommended to go to the hospital in time for regular treatment.