Chronic Prostatitis: Common Questions and Concerns - Urology

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Hello, doctor.
I apologize for interrupting you during your busy schedule.
I am a person with a BMI above the normal range.
A year ago, due to prolonged sitting and lack of exercise, I experienced pain in the groin area.
After visiting a urology clinic, I was diagnosed with groin muscle inflammation.
A month later, I developed pain in the lower part of my testicles and returned to the urology clinic, where I was diagnosed with chronic prostatitis through a physical examination.
The doctor prescribed medication and advised me to avoid prolonged sitting.
After taking the medication and being mindful of my sitting habits, my symptoms nearly disappeared.
Recently, due to home schooling, I experienced similar pain again from prolonged sitting and visited the same urology clinic.
The doctor indicated that it was likely another case of prostatitis and prescribed five days of XATCNE E.C.
TABLET and IBUPROFEN 400.
After being cautious about sitting and taking the medication on time, my symptoms improved again.
Last week, I suddenly experienced itching in the urethra, frequent urination, and a feeling of incomplete urination, along with occasional pain in my lower back and groin.
After another visit to the urology clinic and a urinalysis, the doctor noted that there was itching at the tip of the urethra and some clear white discharge.
Following the urinalysis, the doctor diagnosed me with a bacterial infection and prescribed four doses of Metronidazole and a week of DOXYCYCLINE 100 and REH NAR TONG TABLE to be taken after breakfast and dinner.
I was instructed to self-examine for discharge within two weeks after completing the treatment.
I apologize for the lengthy message; I wanted to provide a complete description.
I have a few questions:
1.
Doctor, as you know, I am 25 years old and still a virgin.
Although I share a toilet with family members, they have not contracted any infections (I have prepared a bottle of alcohol to disinfect the toilet seat after using it).
Is it really possible to have such bad luck and contract a sexually transmitted infection indirectly as a virgin? Or could it be related to my chronic prostatitis?
2.
I have read many questions and answers regarding chronic prostatitis on Taiwan's e-hospital platform and noticed that the treatment duration is quite long, with a high recurrence rate, primarily managed through a regular lifestyle and a light diet.
Could my weight be a contributing factor? Or is prolonged sitting the main cause? Could this urinary tract infection have any impact on my chronic prostatitis?
3.
I am currently on the third day of treatment.
Over the past few days, I have occasionally experienced sudden pain in the upper part of my lower back, but I lifted heavy objects yesterday, so I am unsure if it is due to the infection or the lifting.
Can a urinary tract infection cause pain in the upper part of the lower back?
4.
Lastly, during the treatment period or the observation period after treatment, is it permissible to masturbate? I am a young man with normal sexual urges, but I have refrained for five days due to concerns about any potential impact, especially since I was not in the mood when symptoms appeared.
The doctor mentioned avoiding sexual intercourse due to the risk of infection, but I found a similar question on Taiwan's e-hospital platform, and the response was only about avoiding intercourse due to the risk of infection.
Is masturbation also not recommended?

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Li, 20~29 year old female. Ask Date: 2021/06/16