A California man says he hasn’t been able to speak to his family in four years because small noises — like the sound of chewing and throat clearing — makes him “fly into a rage.”

Derrol Murphy, 41, suffers from misophonia — a mysterious condition in which people experience strong negative reactions to ordinary sounds like chewing or breathing, according to the Daily Mirror.

“I thought I was crazy for many years. Little noises would make me just fly into a rage,” said Murphy, a graphic design production manager from San Diego.

“People don’t understand it and I can’t explain it. It’s affected relationships, especially people I’ve been dating and family members, because you take it out on the people closest to you because you think they should understand.”

Murphy says the condition, which he has lived with for as long as he can remember, has left him unable to see relatives due to mundane occurrences, like throat clearing.

“It’s definitely made dating interesting, and I haven’t been able to speak to relatives for years as the throat clearing would make situations tense,” he said.

According to Harvard Medical School, common sounds like breathing, yawning or chewing “create a fight-or-flight response that triggers anger and a desire to escape” in people who suffer from misophonia.

Murphy claims he has abruptly left dates with loud eaters and has nearly attacked co-workers who click their pens.

“I’m not an aggressive person, noises just anger me. I’ve had to walk out on dates if they are chewing really loudly, my face gives it away — I pull a look of disgust I can’t hide,” Murphy said, adding, “Chewing is a big one and specific voices. I hear everything all the time.”

Murphy, who wears headphones for three hours a day to block out noises, noted, “One noise can stick out and if I’m in a restaurant, I hear one person’s voice and then I hear the cutlery, it makes me go crazy.”

Other noises that send Murphy into a tailspin include “the rustling of plastic bags.”

“I haven’t been to the movies for more than 10 years because people opening food bags is a very bad trigger,” said Murphy.

Despite his extreme struggle with the disorder, also referred to as selective sound sensitivity syndrome, Murphy has managed to carry on a relationship with co-worker Kurt Vin, 41, for the last two years.

On their first date, Murphy had to warn Vin about his sensitivity to chewing — and now Vin does a “warning signal” before Vin makes a noise that will drive Murphy up a wall.

“When Kurt chews, his jaw clicks and when we first started dating, he was eating with his mouth open on the first date,” Murphy said. “I thought there was no way it was going to work and had to tell him pretty quickly.”

When Vin anticipates making a noise that will set Murphy off, “Kurt will shout to cover my ears then I can brace myself” — a gesture Murphy appreciates.

“Misophonia contributed to the breakdown of my relationship with my ex, so it’s huge that Kurt is so understanding,” said Murphy. “Most people say they understand, but he just has to look at my face to know when a noise is getting to me.”

Murphy hopes to raise awareness about the condition, which he finally put a name to when he was 30.

“Hopefully, people will get a bigger understanding of it and realize that just because you can’t see it, doesn’t mean it isn’t there,” he said. “It’s actually real and people need to be patient with people who have to deal with it.”