How to distinguish between prostatitis and a sexually transmitted disease?

Patient's question:

Before sexual activity, there was a recurrence of a significant amount of prostatic fluid when the penis was not erect, whereas previously it only flowed out after erection and not in such large quantities. For a month, the examination and test results were: no previous treatment history and effectiveness: no matter what kind of help: doubt

Doctor's answer:

Hello. Based on your symptoms, it is necessary to consider chronic prostatitis. For sexually transmitted diseases, symptoms generally include dysuria and urethral discharge.
Advice: You need to undergo a urinalysis, prostatic fluid analysis, and bacterial culture to confirm the diagnosis of prostatitis. This will also help determine the type of prostatitis, allowing for targeted medication.
Since patients are directly affected by prostatitis, we should promptly implement symptomatic treatment principles and avoid delaying medical consultation. If prostatitis does not improve with treatment, it is important to promptly adjust the treatment plan.