I thought I had pulmonary infection or even ashma. I was so anxious until I found out that it was a sinus infection. What is sinusitis? It refers to the inflammation of the sinuses and the nasal passages. It can cause headache, pressure in our eyes and even a hacking cough. Sinusitis can be treated but it can be trigger again with some unexpected allergies. I am getting better now and I am not coughing anymore.