Blocked breathing through one nostril is often due to a deviated nasal septum, swelling from a cold or allergy, or a nasal blockage such as a polyp. Since salt water has not helped, try steam inhalation, keep your nose moist, avoid dust and smoke, and stay well hydrated to reduce swelling. You can also use a saline spray regularly and sleep with your head slightly elevated for better airflow. If the problem continues or worsens, consult a doctor to determine the exact cause and receive appropriate treatment.

A deviated nasal septum can cause nasal blockage, leading to sinus pressure, headaches, and a feeling of heaviness in the ears. Do steam inhalation, keep your nose moist, avoid dust or cold exposure, and maintain good hydration to reduce symptoms. Try to sleep with your head slightly raised and follow a regular routine to ease pressure. If symptoms persist or worsen, consult a doctor to assess whether further treatment is needed.