Sinusitis is inflammation or swelling of paranasal sinuses usually rhinogenic is characterized by facial pain, headache ,nasal discharge caused by viral, bacterial or fungal infections, or allergic reactions.

Different types of sinusitis:

• Sphenoid sinus
• Frontal sinus
• Maxillary sinus 

Causes:
• Bacteria, or rarely fungus
• Allergies
• Nasal polyps

Symptoms:
• Nasal obstructions and congestion
• Purulent rhinorrhea 
• Facial pain
• Malaise 
• Headache 
• Fever
• Postnasal drainage