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Usually, the infection starts from one side of the maxillary sinus. It can spread through the other sinuses when not treated immediately. Clogged nose can also contribute to the pressure-like pain that he feels behind the nose. The pain around the eyes and the pressure from the cheeks causes blurred vision. When both sides of the maxillary sinus have infection, there is a tendency that vision from both eyes will also become blurry.
There are two major types of sinuses that can cause sinus drainage. These include the ethmoid sinuses and the maxillary sinuses.The ethmoid sinuses are located in the area above and between your eyes and drain into the upper nasal passages. The maxillary sinuses are located in the cheeks on either side of the nose.