Red eye is a very common condition in ophthalmology. It is called red eye because the most important feature of the disease is eye congestion, mainly due to inflammatory irritation caused by local bacterial infection. Therefore, early pharmacological intervention is needed after the appearance of this symptom. Under normal circumstances, it takes about 2-3 weeks to recover from the symptoms of ocular congestion, and if the infection is more virulent, it may last longer. For the treatment of this disease, anti-infection is still the main focus. In the early stage, choose sensitive antibiotic drugs to control inflammation, such as levofloxacin hydrochloride eye drops and tobramycin eye drops, and the frequency of eye dosing should be decided according to the severity of the disease. As the symptoms decrease, gradually bring the frequency down until the symptoms are completely back to normal. In addition, this disease is contagious, so it is important to be well isolated during disease treatment and recovery.