Red eyes after swimming may be infectious conjunctivitis, pool chemical stimulation and water temperature is not appropriate, etc., there are obvious signs and symptoms recommend timely medical attention. 1. First of all, the more common reason for children to have red eyes after swimming is infectious conjunctivitis, especially in public pools or their own colds and other immunity is easy to get infected, the main manifestation of the eyes red and swollen and increased secretion, the need to improve the slit-lamp microscopy and other auxiliary examination, and then to be levofloxacin or tobramycin and other anti-infective treatments. 2. In swimming pools and other places in order to ensure water quality in the disinfection process will use some chemicals, as well as the phenomenon of people urinating in the water and other phenomena leading to high chlorine and other elements of the pool, which in the lifting of the eyes after the eye surface caused by the stimulation of eye redness. 3. In the family or some small swimming pools there may be water temperature is not suitable for the situation of high temperature, due to the conjunctival blood vessels are more superficial in the heat may appear congestion and thus show red eyes, you can try the water temperature before swimming in the right temperature and then carry out activities. It is recommended to pay attention to personal protection in public swimming pools, use goggles and avoid rubbing, etc., and seek medical treatment in time if there is obvious discomfort.