The CT value of 2Hu considers tissue that may be moisture, with a density similar to that of moisture. The CT value is a measure of the absorption of X-rays by tissue, and Hounsfield defined a scale that later defined the unit of the CT value as Hu. The CT value is defined as 0Hu for moisture, -1000Hu for air, and +1000Hu for dense bone. A CT value of 2Hu is close in density to moisture and is considered to be moisture or moisture-like tissue. The size of the CT value alone does not confirm the diagnosis of the disease, but also a combination of clinical symptoms, blood flow, temperature, CT machine and other factors. Therefore, it is necessary to bring CT films, examination reports, and consult the doctor in detail to comprehensively determine which condition the CT value of 2Hu is.