C-reactive protein and hematocrit are both indicators of inflammation and may be elevated in infectious diseases, such as respiratory tract infections, gastrointestinal tract infections, and genitourinary tract infections. For example, when a respiratory tract infection is accompanied by coughing, coughing, chest tightness and wheezing, the elevated blood sedimentation and C-reactive protein should be considered to be caused by an infectious disease, and anti-infection treatment can be actively carried out. Immune diseases may also have elevated sedimentation and C-reactive protein, such as rheumatoid arthritis, systemic lupus erythematosus, etc. The increase in sedimentation and C-reactive protein usually indicates that the disease is in an active stage. Treatment, such as the use of anti-rheumatic immunosuppressants, is usually required. When the original disease is controlled or in remission, the blood sedimentation and C-reactive protein indexes can be lowered upon review.