Selena Gomez could have died from a potentially fatal post-surgery complication after she underwent a kidney transplant. Her best friend Francia Raisa recalled how the singer was so scared for her life after the operation.

Fatal Scare

Raisa revealed that Gomez suffered a post-transplant complication that could have led to her death. In an interview with W Magazine, the 29-year-old recalled the moment she woke up from the three-hour kidney transplant, she received a text from the singer about the complication. The "Wolves" singer told her that she was "really scared" because she broke an artery.

"My kidney was very active, and when she turned, she broke an artery," Raisa revealed, adding that Gomez had to be taken to emergency surgery to have a vein from her leg removed to build a new artery that would keep her new kidney in place.

"She could have died," Raisa said of the potentially fatal health scare.

Match Tests

In the same interview, the Grown-ish actress recalled the moment she decided to donate a kidney to her best friend. She said it happened while she and Gomez were living together and the singer's lupus took its turn for the worst that she developed arthritis.

Gomez had just had her tests done when she came home looking serious. Raisa remembered seeing her attempt to open a bottle of water and eventually threw it to the floor when she could not. Then Gomez fell to the floor and started crying.

Raisa asked what was wrong, and Gomez told her that she needed new kidneys, but the waiting list is seven to 10 years. That was when she volunteered to be tested. She went behind the singer's back and called her assistant to get the information and that was how the process started.

Fortunately, the test turned out positive. They were a match. The friends underwent the surgery last summer but opted to keep it private. The public only learned about it when Gomez revealed in a social media post that she had a kidney transplant.

The 25-year-old surprised fans in September when she shared an Instagram photo of her and Raisa from their hospital beds, hooked to a BP monitor and oxygen support. In the snap, the friends are holding hands and smiling at each other.

A post shared by Selena Gomez (@selenagomez) on Sep 14, 2017 at 3:07am PDT

The pair then opened up about the surgery in a joint interview, where Gomez acknowledged that Raisa saved her life. She also talked about the post-transplant complication, which led doctors to do a six-hour surgery on her.