The difference between prostatitis and cystitis is mainly due to the differences in causes, symptoms, and treatment modalities, and the specifics should be determined under the diagnosis of a doctor. 1. Causes: Cystitis is usually caused by holding back urine for a long time, bacterial infections, and low immunity, while prostatitis can be caused by factors such as mental stress and excessive masturbation, in addition to bacterial or viral infections. 2. Symptoms: Symptoms of prostatitis are usually characterized by abnormal urination, sexual dysfunction, and pelvic-sacral pain, while cystitis usually presents symptoms such as lower abdominal pain, frequent urination, and painful urination. 3. Treatment: Some patients with prostatitis may have abscesses that require surgical drainage, while patients with cystitis can be treated with bladder irrigation. Prostatitis and cystitis are two different diseases, patients need to go to the hospital for relevant examination, diagnosis and treatment for different causes.