The causes of recurring iritis may be related to low immunity, bacterial or viral infections, etc. 1. Low immunity: The occurrence and recurrence of iritis may be caused by the decline of the body’s resistance, or fatigue, exertion, alcohol consumption, and colds, leading to congestion in the position of the white of the eye, and sometimes photophobia, tearing, as well as obvious pain. 2. Bacterial or viral infections: Infection by pathogens such as bacteria, fungi, viruses and parasites can cause iritis to occur and recur. There may be other causes of recurrent iritis. It is recommended to visit the hospital in time to find out the cause of the disease, and give appropriate treatment and management under the guidance of the doctor.