Children’s fever eyes red may be not pay attention to eye hygiene, pharyngeal conjunctival fever caused by conjunctivitis and other reasons. 1. Don’t pay attention to eye hygiene: children usually don’t pay attention to eye hygiene, rub their eyes with dirty hands or cause the conjunctiva to be infected by bacteria or viruses, triggering symptoms such as conjunctival congestion, itchiness, or increased secretion, which will lead to red eyes when the fever occurs. 2. Pharyngoconjunctival fever: Adenovirus infection causes pharyngoconjunctival fever, in which children develop fever, pharyngitis or conjunctivitis. If the onset of the disease is more acute, there will be fever, red eyes and other symptoms of conjunctivitis. When a child has symptoms of fever and red eyes, parents are advised to go to the hospital for timely examination and diagnosis, and under the guidance of the doctor to carry out the correct treatment.