Cysts can arise through a variety of processes in the body, including.  1 wear and tear or simple obstructions to the flow of fluid, 2  infections, 3  tumors, 4  chronic inflammatory conditions, 5  genetic (inherited) conditions,  defects in developing organs in the embryo.
1 Acute * sinusitis often develops after a person has had a cold, with symptoms lasting less than 3 weeks. 2  Chronic * sinusitis can last 3 to 8 weeks or longer; it often occurs in people who have allergies or asthma. 3  Recurrent sinusitis consists of several acute episodes of sinusitis in 1 year.
Sinus Infection Facts. Sinus infections occur when the sinuses become swollen or inflamed as the result of a common cold, bacteria, allergies or fungal infections. Symptoms include swelling and possibly pain in the face, thick discharge in the nose and throat, aching in teeth and jaws, reduced sense of smell and taste and a persistent cough.