Symptoms of acute exacerbation of chronic sinusitis in children, such as nasal congestion, runny nose, olfactory impairment, systemic symptoms. 1. Nasal congestion: Nasal congestion is a common symptom of acute exacerbation of chronic sinusitis in children, which is caused by acute congestion, edema and accumulation of secretions in the nasal cavity. 2. Runny nose: during the acute attack of chronic sinusitis in children, nasal discharge is mainly purulent, which drains from the middle nasal passage to the nasopharynx. 3. Olfactory dysfunction: children may have temporary olfactory dysfunction, mainly due to the accumulation of secretions in the olfactory fissure, or irritation of the mucous membrane in the olfactory region, resulting in temporary olfactory dysfunction. 4. Systemic symptoms: some children may also have headache, refusal to eat, fever, lethargy and other symptoms. There are many symptoms of acute attack of chronic sinusitis in children, after the appearance of the above symptoms, it is recommended that the patient go to the hospital in time, take standardized medication and treatment as prescribed by the doctor, and do not ignore the symptoms and take them lightly.