Sinusitis and rhinitis are inflammatory diseases in different parts of the body, and sinusitis is relatively more serious when comparing the causes, clinical symptoms and complications. 1. Causes:Acute rhinitis is caused by viral infections, viral invasion of the body triggered by cold, excessive fatigue and other systemic factors, or nasal septum deviation, chronic rhinitis and other local factors. Acute sinusitis is mainly caused by inflammation, in addition to the causative factors of rhinitis, it may also be caused by medical infections, tonsillitis, sinus trauma or foreign objects. 2. Clinical symptoms: the initial stage of acute rhinitis is characterized by dryness and burning sensation in the nose, followed by nasal congestion, watery nasal discharge and other symptoms, and systemic symptoms such as general malaise, fatigue, headache and other discomforts may occur. The clinical symptoms of sinusitis are nasal congestion, pus, headache or localized pain, etc. Chilliness, fever, loss of appetite, constipation, body discomfort and other symptoms may occur. 3. Complications:Acute rhinitis may lead to acute sinusitis, acute otitis media, acute pharyngitis, laryngitis, tracheitis and bronchitis and other complications. Acute rhinosinusitis infection in addition to cause the same complications as rhinitis, because the orbit, skull base and nasal cavity, sinus anatomically close, so the spread of inflammation can cause rhinogenic orbital and intracranial complications, such as: periorbital cellulitis periorbital cellulitis, retrobulbar optic neuritis, epidural abscess, brain abscess. Compared with rhinitis, sinusitis has more causes, more complex clinical symptoms, and has a greater impact on the body once complications occur. If you have nasal discomfort, you should go to the hospital in time for treatment.