Actually they can
Yes, women can experience a similar phenomenon to "blue balls,"
often referred to in colloquial terms as "blue vulva" or "pink pelvis". The underlying physiological cause, known as epididymal hypertension (EH) or vulvar vasocongestion, is the same in both men and women.
The Physiology of "Blue Vulva"
The discomfort is caused by vasocongestion, the natural increase in blood flow to the genital area during sexual arousal. In women, this causes the clitoris, labia, and vaginal walls to swell and become engorged with blood, preparing the body for sex.
If arousal continues for a prolonged period without an orgasm to provide release, the blood remains pooled in the pelvic region. This can lead to a feeling of pressure, aching, or heaviness.