When a sinus infection occurs, the sinus cavities, which are spaces within the bones of the face that lie behind the nose, become filled with mucus and fluid. This can cause the sinuses to become blocked, preventing normal drainage of mucus and fluid. As a result, the infection can spread to the upper respiratory system, including the sinuses, and the conjunctiva can become infected as well.**
The most common causes of bacterial sinus infection include Streptococcus pneumoniae and Haemophilus influenzae. These bacteria can enter the sinuses through the nasolacrimal duct, which connects the eye with the sinuses, and cause an infection. The symptoms of a bacterial sinus infection are often similar to those of pink eye, including red and swollen eyelids, abundant discharge, and a feeling of something in the eye. Sinus infections can occur in childhood and adults and can be treated with antibiotics to clear the infection and reduce symptoms.**
Viral conjunctivitis, on the other hand, is caused by viruses and is not contagious. It is often associated with upper respiratory infections like the common cold and can spread even before symptoms appears. Treatment for viral conjunctivitis focuses on managing symptoms and providing supportive care. Symptoms of viral conjunctivitis can include itching, watering, and crust on the eyelashes and outer edges of the eye. It is usually self-limiting, meaning that it typically resolves on its own within one to two weeks without specific treatment.
