Place it in the middle of an outdoor scene after the dialogue ends, then follow it with a quick hand slap effect and a startled reaction sound to sell the bite that never actually happened on camera.
關於此聲音
This clip is the thin, high-pitched whine of a mosquito hovering close to the ear, lasting about seven seconds. It feels instantly irritating and restless, like a pest you can hear but cannot catch, which is exactly why it gets under people's skin so fast and makes them swat at empty air.