40 children aged 3 to 7 years were examined. The main group consisted of 12 children with recurrent obstructive bronchitis, with a verified diagnosis of primary arterial hypotension (group 1), the comparison group consisted of 18 patients with recurrent obstructive bronchitis and normal blood pressure (group 2), the control group consisted of 10 conditionally healthy children. The examination included the collection of anamnesis, clinical and laboratory studies. It has been established that in the development of recurrent obstructive bronchitis in children with primary arterial hypotension, unfavorable factors of a family history, the pathological course of pregnancy and childbirth in the mother, and the features of the premorbid background in postnatal ontogenesis are important.