Muscle tension refers to the muscle is spasmodic state, caused by the following reasons: 1, neck muscle tension, may be cervical spine disease, neck muscle strain caused by long-term sedentary, too much exertion related to the neck muscles can be sore, pain, stiffness and other symptoms. It is recommended to check the cervical spine nuclear magnetic first, first exclude cervical spine disease. 2, in the case of sudden shock, the whole body muscle reflex tense state, is a kind of protective reflex of the human body, can be accompanied by symptoms such as increased heart rate, do not need to be treated. 3, neurasthenia, is a kind of functional lesion, and long-term tension, too tired to work, the common clinical symptoms of headache, insomnia, easy to hurry to provoke, muscle tension, etc.. In addition, peritonitis can appear rebound pain, muscle tension, pressure pain and other symptoms, muscle tension, it is best to go to the hospital for further examination and diagnosis.