Good afternoon! Prompt, please, my younger son, to which 3.5 years, d...

[The anonym]

Good afternoon! Prompt, please, my younger son to whom 3.5 years, in the afternoon normally breathe a nose of the house and in the street; at a dream - sensation such, that the nose does not breathe absolutely - sleeps with the open mouth.
To what doctor to address first of all or that it is possible to undertake. Thankful in advance for the answer.
Lena

[Doctor V.I.Kochenov.]

To sleep edgewise.