The abdominal cavity does not necessarily have multiple lymph node enlargements when C-reactive protein is high. C-reactive protein is a protein that rises sharply in plasma when the organism is exposed to infection or tissue injury (acute temporal protein), and it is a non-specific marker of inflammation and tissue injury. When inflammation or tissue injury occurs in the organism, C-reactive protein is promptly generated by hepatocytes and rises rapidly, reaching its highest value in about 48 hours. When external bacteria and viruses enter the body, inflammation and lymph node enlargement in different parts of the body can occur. Multiple enlargements occur when the abdominal lymph nodes are infected or in response to other inflammatory reactions; at this time, C-reactive protein will increase. However, when C-reactive protein is high, the abdominal cavity does not necessarily become enlarged with multiple lymph nodes. It is important to note that both high C-reactive protein and multiple abdominal lymph node enlargement should be seen in a timely manner.