Acute cystitis is an acute inflammatory disease of the bladder wall caused by a non-specific bacterial infection and is a common disease of the urinary tract. The onset of the disease is rapid and often occurs after overexertion, cold, prolonged urine holding, or sexual intercourse, and the course of the disease usually lasts 1 to 2 weeks and subsides on its own or after treatment. The common symptoms are bladder spasm, urinary frequency, urinary urgency, painful urination, purulent urine and terminal hematuria, and even the whole hematuria. Precautions for prevention: 1. Drink more water to increase urination, which can prevent or even treat the condition of infection; 2. Take hot baths to reduce pain; 3. Take anti-inflammatory drugs such as aspirin to reduce the burning sensation caused by inflammation; 4. Take vitamin C to acidify urine and interfere with bacterial growth; 5. Wipe the anus from front to back after defecation to prevent recurrence of infection; 6. Go to the toilet before intercourse to avoid cells 7, consider whether to use the uterine condom contraceptive device, because the uterine condom contraceptive device is easy to cause recurrent bladder infection, if the infection, should consider changing to other methods of contraception; 8, try to use tampons instead of tampons; 9, pay attention to personal hygiene, wear cotton underwear, easier to keep 10, bladder infection patients should see a doctor once there is bloody urine, pain in the lower back and lumbar fossa, fever, nausea or vomiting.