Jaundice rises again after taking blue light treatment, which may be caused by improper treatment or aggravation of the disease. 1 Improper treatment: If the jaundice rises again after the blue light treatment, it should be considered that the blue light irradiation course is not enough. When the treatment is not enough, the blue light reduces the bilirubin in the skin, but the bilirubin in the blood is not reduced, and after the blue light irradiation is stopped, the bilirubin in the blood seeps into the skin, and jaundice will appear. 2. Jaundice aggravation: If jaundice rises after blue light irradiation treatment, it may be caused by aggravation of the disease. Patients may have symptoms such as poor spirit, abnormal urine color, light stool color, drowsiness, convulsions, etc., and jaundice symptoms appear repeatedly. There are many reasons why jaundice rises again after returning from blue light treatment, and patients are advised to report to their doctors in time to find out the cause of the disease. Once diagnosed, one should cooperate with the doctor to take relevant treatment measures. At the same time, it is necessary to ensure sufficient rest time and avoid overwork. Keep the skin clean and clean, avoid scratching the skin.