An onomatopoeic word for a sharp, throbbing pain or the sensation/sound of such a pain (typically used as 'ずきんと').
針を刺したところがずきんと痛んだ。
The spot where the needle went in gave a sharp, throbbing pain.
夜中に頭がずきんときて目が覚めた。
In the middle of the night a sharp throbbing hit my head and I woke up.
歯がずきんとするので歯医者に予約した。
My tooth was throbbing, so I made a dentist appointment.