We all have them but are unaware of their existence. Until, that is, they become blocked and inflamed and very painful. Most of us would have had our own experience of sinusitis, or inflammation of the sinuses. This usually happens during or just after a cold, and it doesn’t matter whether its is a mild or severe dose that affects you. Your nose becomes blocked; there is an ache in your face that gets worse when you try to clean the blockage by blowing your nose. Allergy sufferers are also very prone to sinusitis and very similar symptoms during allergy season.