There can be many different reasons why you can't breathe through your nose. Nasal congestion is one of the most common problems that can make it difficult to breathe through your nose. Allergies, a cold, or a sinus infection can all cause congestion. In many cases, congestion can be relieved with over-the-counter medications, such as decongestants or antihistamines. If your congestion persists, you should see your doctor.
Structural Problems
There are also structural problems that can make it difficult to breathe through your nose. Deviated septum is a common issue that can cause difficulty with breathing. This is a condition where the cartilage in the nose is shifted, blocking one or both of the nasal passages. Surgery is usually required to correct a deviated septum. Another structural issue is a nasal polyp. These are growths in the nose that can block airflow. Polyps can be removed surgically.
Nasal Obstruction
Nasal obstruction can also be a cause of difficulty breathing through the nose. This can be caused by a foreign object, such as a piece of tissue, or by a tumor. If the obstruction is caused by an object, it can be removed by a doctor. If the obstruction is caused by a tumor, it will require further medical attention.
Anatomical Issues
Anatomical issues can also make it difficult to breathe through the nose. If the nostrils are too small or the shape of the nose is not conducive to proper airflow, it can be difficult to breathe through the nose. In some cases, surgery may be required to address this issue.
No matter the reason why you can't breathe through your nose, it is important to seek medical attention to determine the cause and find the best treatment option.