Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. What is sinusitis? According to medical specialists, sinusitis is the inflammation of paranasal sinuses. Basically, sinusitis can occur due to allergy, infection and autoimmune issues. Health officials have also underlined that sinusitis can occur when one catches a cold and when one have small hairs within his sinuses which do not work effectively. Ahead of all, sinusitis... Mehr