Final answer:
Sinusitis is a condition characterized by inflammation of the sinuses. It can be caused by viral or bacterial infections and environmental factors. The primary contributing factors include infections, allergens or irritants, and structural problems in the sinuses.
Step-by-step explanation:
One condition from the upper respiratory disorder type is sinusitis, which refers to the inflammation of the sinuses. It can be caused by a viral or bacterial infection and environmental factors such as allergies or exposure to irritants like smoke. The primary contributing factors of sinusitis include infections, breathing in allergens or irritants, and structural problems in the sinuses. For example, a common cause of sinusitis is a viral infection, such as the common cold, which can lead to swelling and blockage of the sinuses.