A sinus is a hollow place or a cavity in the body of a person especially at the nasal cavity. The Sinus trouble may be primarily caused by such factors as excessive discharge which causes the ducts to be closed or the nose to be greatly inflamed. The Sinus trouble cause a lot of difficulties to the sufferers as they more often than not are unable to undertake day to day activities like smelling. More often than not, these difficulties are secondary in the sense that they are exhibited when one is suffering from such ailments as colds. Some side effects which are exhibited by a person suffering from sinus trouble include headaches, loss of the ability to smell as well as dizziness.