Physiological factors lead to light red color of urine is generally not serious, while cystitis, kidney stones and other causes are more serious and need timely treatment. 1. Physiological reasons: Consumption of dragon fruit, beets and other foods containing pigments or the drug rifampicin may lead to light red urine color. This condition can be relieved by stopping consumption and is generally normal without special treatment. Therefore this condition is not serious. 2. Pathologic causes: (1) Cystitis: Due to repeated stimulation of inflammation, it can lead to local mucous membrane damage of the bladder and lead to bleeding, and the blood and urine mix together, which can manifest the condition of light red color of urine. Untimely cystitis can lead to bladder fibrosis, which reduces the capacity of the bladder and causes urine reflux, and the upward movement of urine can easily cause upper urinary tract infection, which can increase the risk of bladder cancer. (2) Kidney stones: when suffering from kidney stones, due to the up and down movement of the stones, it may lead to the destruction of the mucous membrane of the urethra, causing urethral bleeding, and the blood is mixed in the urine, which can be manifested as the color of urine is light red. If the condition is serious, it is easy to cause hydronephrosis. If the obstruction is not relieved by timely treatment, it may even lead to kidney failure. In the case of light red urine color, after excluding physiological reasons, you need to go to the regular hospital in time for examination and treatment.