In summer, children sneezing in the morning may be caused by environmental factors, allergic rhinitis, sinusitis and so on. 1. Environmental factors: If the air conditioning temperature is too low at night, causing the child to catch a cold, sneezing will occur in the morning. 2. Allergic rhinitis: this disease is mainly affected by genetic, environmental and other factors, resulting in summer children sneezing in the morning, the main clinical manifestations of nasal itching, paroxysmal continuous sneezing, a large number of watery nasal mucus and nasal congestion and other symptoms, usually after the change of the season can be relieved. 3. Sinusitis: summer children sneezing in the morning may be caused by sinusitis, the disease is mainly caused by bacterial, fungal and viral infections, children mainly manifested as nasal congestion, pus, loss of sense of smell, head and face pain and other manifestations. Summer children sneezing in the morning may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.