Similiar to blue balls
and also known as vasocongestion.
The discomfort in females when aroused but not able to orgasm which is due to the buildup of blood, ejaculatory fluids and pressure in the vulva and pelvic region.
Easily "cured" with masturation or lessened with time.
Sometimes she took so long to orgasm from oral that her boyfriend stopped and she was left with plaid clit.