Simply stated, it is breathing through the mouth instead of the nose. Mouth breathing starts when we can’t get enough air through the nose, so the mouth takes over. This forces us to breathe through the mouth out of sheer necessity.
Breathing is meant to happen through the nose, It is perfectly natural to breathe through your mouth at certain times, such as when lifting a heavy load or exercising. While we all breathe through our mouths some of the time, we must use our noses for the majority of our breathing. Otherwise, we can develop some surprising health issues. Learning about your own breathing habits, and correcting the negative can make a massive difference to the quality of your life and your long-term health.
It is estimated that we breathe about 20,000 times a day. That means there are 20,000 chances for the human body to not function at its top capacity!
Some of the causes of mouth breathing can include:
Each of these factors contributes to nasal obstruction making it difficult, sometimes impossible, for a person to nasal breathe. If nasal breathing is not possible, the body’s only choice is to mouth breathe.

Normal Adenoidal Tissue vs Swollen Adenoidal Tissue
Habitual breathing through the mouth can lead to a broad range of symptoms and risk factors in children and adults. while it can be difficult to know if you are yourself breathing correctly while sleeping, waking with a dry mouth or very bad breath can be simple and immediate warning signs.
Unchecked, chronic mouth breathing is linked to sleep apnea, dental problems, cognitive decline, and chronic fatigue, as well as the deterioration of the body’s production of nitric oxide, a molecule that is vital to the regulation of blood flow, platelet function, immunity, and neurotransmission.
Some common effects of chronic mouth breathing can also help you identify the possibility that you are mouth breathing without realizing it:
Additional symptoms that typically result from chronic childhood mouth breathing:

When we breathe in air through the nose, the air we breathe is filtered as it makes its way through the nasal passage and into the mucus-lined windpipe. Both the tiny hairs in the nose and the mucus in the windpipe work to protect our bodies from foreign particles before they are able to enter the lungs.
Once the filtered air enters the lungs, the oxygen is pumped into our bloodstream and circulated throughout the body. And finally, when air exits the body through exhalation, it brings with it carbon dioxide from our cells and other waste materials.
The main advantages of nose breathing include:
Nitric Oxide aids in the proper absorption and release of gases in the lungs. When the body is deprived of the proper oxygen, a number of bodily functions can be affected and lead to symptoms such as high blood pressure, heart problems, sleep apnea, and other medical issues. In children, oxygen deprivation as a result of mouth breathing has been linked to poor growth and weak academic performance, as well as ADD and ADHD symptoms. Mouth breathing can also affect the position of your teeth and your bite. When the mouth is open, the lips are weak and there’s no external support for the teeth. The tongue simultaneously pushes forward, progressively moving the teeth over time.

Myofunctional therapists can assist in finding the cause or causes of mouth breathing and recommend the best course of treatment. We work with a network of professionals to aid in this journey.
Eliminating factors contributing to airway inflammation such as adenoids, nasal polyps, and allergies are key. This could include an evaluation by an ENT, diet changes, and nasal hygiene techniques. Orthodontics and/or expansion may also be needed. through a series of targeted exercises involving the tongue, and lips. Myofunctional therapy encourages the widening of the airway and fosters the ability to breathe through the nose rather than the mouth. It does so by teaching a series of stretches and exercises to strengthen, retrain and balance the muscles of the face, mouth, and throat. As a result, when you are not eating or speaking, your orofacial system is at rest as follows: with lips closed, teeth slightly touching, and tongue resting gently against the upper palate.
Mouth breathers have learned to compensate by using their facial muscles incorrectly over time. They are dealing with muscles and habits that have been conditioned and ingrained in their everyday mechanics for years and it will take time to recondition these habits.
In addition to myofunctional therapy, breath retraining through the Buteyko Breathing Technique is also highly recommended. This therapeutic breathing method uses breath retention exercises to control the speed and volume of your breath. This helps you to learn to breathe more slowly, calmly, and effectively.