CK refers to the enzyme creatine kinase, which is mainly found in tissues such as skeletal muscle and cardiac muscle. High CK may be the result of diseases of the cardiac muscle, skeletal muscle, and other tissues, such as heart attack and rhabdomyolysis. Creatine kinase is a key enzyme in cellular energy metabolism, and is found in the highest levels in skeletal muscle, as well as in tissues such as heart muscle cells and brain cells. Its normal level varies by gender, ranging from 19 to 226 IU/L in men and 20 to 140 IU/L in women. Creatine kinase level is mainly used in the diagnosis and prognosis of cardiac muscle, skeletal muscle and brain diseases, and its elevated level can reflect the lesions of the above tissues. For example, in acute myocardial infarction, rhabdomyolysis, myocardial inflammatory lesions, etc., the cells are necrotic and creatine kinase is released into the blood, which can lead to the elevation of creatine kinase level in the blood. Elevated creatine kinase can be seen in a variety of diseases, if you find elevated creatine kinase levels, it is recommended to consult a doctor in time to clarify the diagnosis, to avoid delaying the condition.