Discomfort in penis along with increased urination frequency, are symptoms of an inflammation of the prostate gland, so called prostatitis.
Pain in testicles, and discomfort in the lower abdomen, low back, groin, rectum or perineum (the area between the scrotum and rectum), and constipation, are additional symptoms of prostatitis.
There are different types of prostatitis, and most common one is bacterial.
Prostatitis can be abacterial, too, appearing in several variants (one known as prostadynia is related to autoimmune and neurological causes, and is believed to be an expression of intestinal cystitis).
You should talk with your urologist about interstitial cystitis, that is an inflammation of the urinary bladder in which the bladder becomes small, scarred, and less able to expand.
Main symptoms are frequent urination, and feeling pressure to urinate.
Possible causes include autoimmune disorder (in which the body's own immune system mistakenly attacks the bladder), an allergic reaction, a hormonal disturbance, a defective mucous lining that would normally protect the bladder, the presence of toxic substances in the urine, or an abnormality of the spine.
Actually, many males who ultimately receive a diagnosis of IC have been previously diagnosed with chronic prostatitis or prostadynia.
Best wishes!
Marija