Most people are not able to differentiate between common colds and a sinus infection. Sinus infection occurs when the sinus openings become swollen as a result of fungal or bacterial infections. Sinuses are the air spaces found in the skull along the nasal cavity. They are lined with mucus membranes that permit air circulation in the body.
You are likely to get this infection when your nasal hair follicles fail to function making it easy for dust particles to enter into the nasal cavity. Another cause may be a common cold which leads to accumulation of mucus in the sinuses and bacteria and fungus are able to thrive in this moist condition….