Indicators of allergic sensitization in routine blood tests are eosinophil count and eosinophil percentage. Normally, the normal range of eosinophil count in routine blood is (0.05 to 0.5) x 10^9/L, while the normal range of eosinophil percentage is 0.4% to 8%. In allergic conditions, such as allergic rhinitis/dermatitis, bronchial asthma, angioneurotic edema, etc., the eosinophil count and eosinophil percentage in the routine blood count will be increased, and may be accompanied by nasal congestion and runny nose, rash, wheezing and other symptoms. Therefore, eosinophil count and eosinophil percentage in routine blood test are indicators of allergy, if this indicator is increased, it is recommended to consult a doctor in time to make a clear diagnosis to avoid delaying the condition.