Many people unknowingly sleep with their mouths open, a habit often dismissed as harmless. However, health experts say it can sometimes signal underlying medical issues that should not be ignored.
According to medical specialists, sleeping with your mouth open isn’t always a sign of disease. In most cases, it occurs when the nose is blocked due to a severe cold, allergies, or enlarged tonsils.
Children are more prone to this, particularly if enlarged adenoids or tonsils partially block their nasal passages. The issue often resolves as they get older.
Possible Medical Causes
A deviated septum—a bent or crooked nasal septum—can also cause nasal congestion, forcing a person to breathe through their mouth. If the blockage becomes severe, surgery may be recommended.
Experts warn that if mouth breathing is accompanied by snoring or difficulty breathing during sleep, it could point to a more serious condition like sleep apnea, which requires immediate medical evaluation.
Impact on Oral Health and Sleep Quality
Mouth breathing can dry out the mouth, leading to poor oral hygiene, bad breath, and even irritation or inflammation. It can also disrupt sleep quality, especially when combined with other sleep disorders.
Health experts suggest consulting a specialist even if you don’t experience symptoms like a dry throat, persistent cough, or breathing difficulty. Identifying and treating nasal obstructions early can prevent long-term complications and improve overall sleep health.

