Prostatitis is generally caused by the retrograde infection of bacteria in the urethra through the prostatic ducts, and it is often seen in patients with urethritis or cystitis. This is because such patients have a large number of bacteria in the urethra, and these bacteria or pathogenic microorganisms can easily cause prostatitis through retrograde infection. Especially in cases of urethral stones or instrumented operations, such as cystoscopy or ureteroscopic lithotripsy, these conditions are more likely to lead to prostatitis. When prostatitis occurs, symptoms such as frequent urination, urgent urination, and painful urination may be present. The patient may also experience difficulty in urination, a thinner urine stream, interrupted urine flow, and pain or discomfort in the suprapubic area and perineum.