A child with a red eye but no pain, it may be subconjunctival hemorrhage, visual fatigue. 1. subconjunctival hemorrhage: a child’s eye is red but not painless and itchy considerations are caused by external stimuli such as subconjunctival hemorrhage caused by reasons, the normal conjunctiva of the eyeball is transparent, and below it is covered with a network of capillaries, which will rupture and hemorrhage when squeezed by external forces. 2. Visual fatigue: If children play with cell phones, computers and other electronic products for a long time, the eyes do not get a good rest, it is very easy to conjunctival congestion, followed by an eye red but not painful performance. This situation needs to pay more attention to rest, immediately stop using the eyes, but also can look into the distance, hot compresses on the eyes. Patients with significant conjunctival congestion are advised to seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.