A Scottish teenager collapsed in agony and died just 20 minutes after applying hair dye.

Tabatha McCourt, 17, began screaming in pain, pulling on her hair and vomiting before being held down by two people while she had a violent fit, her friends said.

McCourt's best friend, Heather Goodhall, called the emergency services, but paramedics who rushed to the house in Airdrie, located in central Scotland, were unable to save her, the Scottish Daily Record reported.

"Tabatha was always dyeing her hair different colors," Goodhall said. "The dye had only been in around 20 minutes when she got up and went to the bathroom. She came back a couple of minutes later, sat down and then began frantically pulling the foils from her hair."

Goodhall added, "She started shouting, 'No, no,' and my [mother's] boyfriend held her and tried to calm her down. Her eyes started going all funny, and then she just started being sick ... She looked just like a rag doll -- limp, just lying there."

McCourt was taken to the local hospital following the incident shortly before 10:30 p.m. Saturday, but she later died.

Police said they were treating the death as "unexplained," and an investigation was underway Thursday.

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