Warm flush feeling around scrotum testicles

[Regrets2010]

For the last month I've had a warm radiating flush sensation in my scrotum/genital area. It comes and goes but it appears to have stayed for about a week and a half now. I've been tested several times for STDs and have had all negative results.

As crazy as this may sound, I've actually started to ice my scrotum for a minute or two. It seems to help as the area will become very cold for several minutes, but the warm sensation remains internally, but not to the touch.

Is this possible? Is this warm flush sensation all in my head? Or is it physically possible?

I've visited a urologist who has taken several urine samples with no indications of infection. I've had a prostate exam as well and all is well.

I search the web and cannot find any answers or reasons. Any recommendations or assistance is most appreciated.  This is driving me crazy! Thank you.

[Vance2335]

Doesn't matter, "I've been tested several times for STDs and have had all negative results." Indicated that this is not STD related.

[Regrets2010]

My issues started after having unprotected sex with a female.

[Vance2335]

I moved this over to dermatology because it has nothing to do with a STD, please do not repost this here.