Although the radiosensitivity of the bladder mucosa is lower than that of the intestinal mucosa, radiation cystitis is still inevitable after high-dose irradiation. Radiation cystitis is mainly caused by radiation-induced vascular damage, small vessel occlusion, mucosal congestion and edema resulting in the formation of ulcers, surrounded by significant edema, often combined with infection and bleeding. The clinical diagnosis is based on 1. a history of radiation treatment in the bladder area or in the vagina. 2. it can be painless hematuria, mild urinary frequency or with painful urination and difficulty in urination. Severe hematuria may cause anemia.3. Routine urinalysis may reveal a large number of red blood cells.4. Cystoscopy: extensive bleeding spots or flaky bleeding spots and small blood vessel anger in the mucosa, ulcers and inflammatory granulation tissue near the triangle are seen. If necessary, biopsy is done to differentiate from tumor. Chinese medicine treatment ideas in Chinese medicine as early as the era of “Nei Jing”, there is a record that “Yang luo injury will lead to blood overflow, blood overflow will lead to epistaxis; Yin luo injury will lead to blood overflow, blood overflow will lead to posterior blood (blood in the stool)”. Personally, I believe that the pathogenesis of radiation cystitis is that radiation burns the bladder mucosa and damages the yin liao and the yin fluid that protects the yin liao. Clinical treatment should not simply stop the bleeding, but should draw the fire downward to give the evil qi a way out, as Tang Rongchuan, a famous doctor in recent times, said: “Blood is made of fire, and dipping the fire is to stop the bleeding. Treatment ideas can be used to cool the blood and diarrhea the fire to nourish yin, clinical can be used Sophora flower powder, pig-ling soup and small thistle drink plus reduction treatment.