Intensely distressing or irritating to the nerves.(adjective)
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Use "nerve-wracking" in a sentence
"Recorded with a Go Pro camera mounted to his head, you hear what he calls the nerve-wracking beep of the Geiger counter checking his radiation exposure as he wound his way with work crews through the dark tunnels and rooms of the reactor."
"Playing in front of the crowd isn't the nerve-wracking bit, it doesn't really bother me how many people are there."
"Mabius keeps a straight face at Posey's unpredictable, sometimes nerve-wracking performance."