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.
A sinus infection is not a contagious disease. However, if it results from a viral infection such as the common cold, then the causal pathogen may be passed from person to person. More information on this subject has been provided in the following article. Advertisement. Your doctor may treat you with antibiotics if you have a bacterial sinus infection that is severe, persistent (stays for more than 10 days) or recurring. Otherwise, the above self-care measures are good enough to manage the condition.