"Blue balls" medically referred to as epididymal hypertension, is a temporary condition experienced by some males when sexual arousal does not result in ejaculation. The term describes a dull ache or a feeling of fullness in the testicles due to prolonged vasocongestion, or increased blood flow to the genital area. While uncomfortable, it is not dangerous and typically resolves on its own or after ejaculation or a reduction in arousal. The blueish hue some may observe is due to blood vessel engo