A UK teen with a severe dairy allergy died after he was apparently “chased” with cheese by a classmate — who then hurled it down his shirt, a London coroner’s court heard this week.

The 13-year-old boy — Karanbir Cheema, who went by Karan — had the allergic reaction in June last year at the William Perkin Church of England High School in Greenford, the UK’s Telegraph reported.

At the time, paramedics rushed an unconscious Karan to a local hospital, but he never regained consciousness, and ultimately died about two weeks later.

Karan’s schoolmate, also a 13-year-old boy, was later nabbed on suspicion of attempted murder for the incident. He has not been charged.

The tragic episode was recounted Wednesday at the Saint Pancras Coroner’s Court.

Paramedic Kierin Oppatt said the emergency call came over as “just an allergic reaction,” but when he arrived, Karan — who had broken out in hives — was “gasping for air,” according to the news outlet.

Oppatt recalled how Karan fell unconscious and stopped breathing shortly after he arrived.

“On arrival at the scene, I immediately knew it was life-threatening and that the patient had a high risk of going into cardiac and respiratory arrest,” Oppatt said.

“We were told by school staff that perhaps someone had chased the patient with cheese and had proceeded to throw it down his T-shirt,” Oppatt recalled, the Telegraph reported. “That he had an allergic reaction, that he was itchy, his skin was very hot, and that he was having difficulty breathing.”

He continued: “He appeared to be in a state of pre-arrest. He had very slow respiration — he was gasping for air. His skin was red and there appeared to be hives.”

Karan’s family members attended the hearing, and his mom, Rina Cheema, demanded “answers” outside of court, according to the news outlet.

“I am devastated as a mother after losing my son and my family have lost their brother,” the mother said.

Speaking of Karan, Cheema said: “He was a very, very bright young boy. He was so bright, he could have been anything he wanted. I brought him up by myself. I trained him to read all about his condition.”

Another family member who asked not to be named added: “I’ve never met anyone like him in my life. He would have done anything for anyone. He could have been anything.”