It might be sinus infection, which also known as sinusitis, is an inflammation and infection of the sinus cavity in your head. It can be a painful and annoying situation, but it can be resolved. The sinus infection might also give you pain and pressure in your face, a loss of smell and flu-like symptoms, including fever or nasal stuffiness. Fortunately, this is easily treated. Your doctor is likely to prescribe medications that can help, including allergy medications or decongestants. You can also indulge in home remedies, such as breathing in steam vapors or using saline nasal solutions.