### Patient: Doctor, I have been experiencing lower abdominal pain and painful urination. Also, I have noticed blood in my urine and back pain. Sometimes, I feel like I have to urinate, but can't. What could be causing all these symptoms?
### Doctor: Based on your symptoms, it sounds like you may have a condition called cystitis. It's an inflammation of the bladder caused by an infection. It can cause the symptoms you described, including lower abdominal pain, painful urination, blood in urine, back pain, and retention of urine. We will need to do some further testing to confirm the diagnosis and determine the best treatment approach.