Four-month-old babies sleeping with their mouths open may be related to nasal congestion and adenoid hypertrophy.
1. Nasal congestion: when the baby has a cold, the nasal capillaries are congested and dilated, and there will be nasal congestion, or when there is boogers blocking the nasal cavity, resulting in poor ventilation, so that the baby sleeps with his mouth open to breathe.
2. Adenoid hypertrophy: due to the inflammation of the nasopharynx, and its neighboring organs, tissues of inflammation repeated stimulation, so that the adenoids pathologic hyperplasia, hypertrophy, varying degrees of obstruction of the posterior nostrils and compression of the pharyngeal tubes, resulting in nasal congestion, open-mouthed breathing symptoms, especially at night aggravation.
Four-month-old babies sleep with their mouths open, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.