What Causes "Blue Balls Or Lovers Nuts?"

Most men are quite familiar with the term “blue balls”. If you are a man, you may have had the unfortunate experience of having blue balls. Blue balls occur when semen becomes blocked  It is no longer in the testes nor has it left the penis. When this happens it is painful, although it is not permanent, nor is it life threatening. For women, do not let the man talk you into intercourse or any other form of sexual release simply because he has or could have blue balls. The blood will soon dissipate and the pain will subside. The man knows this is a real condition and the woman will now understand more with this article.
Blue balls do not affect every man, just as if impotence does not affect every man. There are times when this may occur, usually after prolonged sexual stimulation. And you asked how does a man get it?  This can occur from an extended period of being aroused. A man has increased blood flow through his penis when he is aroused, which is what makes his penis hard. His testicles also swell and if he does not ejaculate, there is no release and the pressure continues to build up. His balls are very sensitive, so if they have been swelling in anticipation of an impending ejaculation and that does not happen he will experience pain. This condition is not fatal and the blood flow will eventually decrease. Until then, he will feel some aches and pain in his groin region.

Blue balls is the slang term for a congested prostate or vasocongestion, the condition of temporary fluid congestion in the testicles and prostate region caused by prolonged sexual arousal in the human male. It is often accompanied by a cramp-like ache of prostatic congestion and pain/tenderness or edema of the testes.

Aldebaran's answer is correct, and it's also a direct quote form the first line of the wikipedia article on blue balls. Basically it happens because your body begins producing ejaculate in anticipation of an orgasm. Orgasm doesn't happen, ejaculate and other fluids don't leave and it causes swelling and pain from the pressure.

Anyone know if this can cause gas? Seems like an odd question, but whenever this happens to me I get really bad gas pains really in my abdomen. It's not just that the condition FEELS like gas pains, because I actually pass gas, though not easily. I wondered if the gas was maybe a side effect of reabsorbing the fluids

A condition during sex caused by the accumilation of blood inside the genitals for too long...
During erection, the penis and testicles fill with blood, because a human body isn't letting the blood drain away as normal, the blood loses oxygen content which make the tissues produce lactic acid which causes the pain.
 
There are various ways of restoring the blood flow so it doesn't hurt, just search it.
 
 

Blue balls is when the testicles are swollen in anticipation of sex. Yes, it is painful. No, women never have any pity on us. Stopping in the middle of sex and then not helping your boyfriend to finish is a good way to be single.

This happens to most men who have a lot of sex, with themselves and or others. Mostly because they have a time period absence, and or privacy. For instance men in jail who were sexoholics on the outside, but must not want to engage with other men. Or young men whose GF live with parents that follow them everywhere, don't let them out of the house much, and were active with their previous GF.

Blue balls hurt like hell any woman who lets a man goes thru that is evil

Blue balls ARE real. They are however, greatly exaggerated. It is caused by having an erection for a while, and not orgasm-ing.

Men and young teenagers get blue ball because they get to horny and want to have sex to much now every girl they see they get on hard

Blue balls ocur when men are having sex and don't finish they can't walk when they have blue balls I have it now

Men catch blue ballz bye not havin enuf time to sperm an the tenticles iy have a bad time curculating yes I hurts an you wnt b able to walk

I thought that was a myth teenage boys used to take advantage of innocent, young girls?!?!?! HAHAHAHAHA

The over imagination of an overly frisky teenage boy. "Blue Balls" Is NOT real.. They will not fall off, or burst if you don't have sex.