-Asthma children with high FeNO levels> 35 ppb, usually BMI in normal range, allergies, respiratory function was normal, using ICS dose is higher than other groups - The group of children with asthma had late onset, increased blood IgE, allergy, BMI was normal, increasing concentrations of FeNO and CANO; the number of eosinophils in the blood was increased, there was a need to use higher ICS doses than the non-IgE increase group - The values of eosinophilia, blood IgE, FeNO, CANO are inflammatory markers that help to classify of asthma phenotypes, predict the severity of asthma and the ability to respond to treatment with corticosteroids.