Biles, the superstar American gymnast who was aiming for six gold medals for the competition, withdrew after a disappointing start.
Without it, the US team finished second behind the Russian Olympic Committee.
Initially, the reason given by the team leaders for his withdrawal was a “Medical problem”.
But, speaking to reporters, Biles, who won four gold and one bronze in Rio, said: “After the performance I put in, I just didn’t want to continue. “
She was not injured, she said, but had suffered “just a little injury to my pride.”
“I have to focus on my mental health. I just think mental health is more prevalent in sport right now… we need to protect our mind and body and not just go out and do what the world wants us to do.
“I don’t trust myself so much… maybe it’s getting old.” There were a few days where everyone was tweeting you and you were feeling the weight of the world.
“We’re not just athletes, we’re people at the end of the day and sometimes you just need to take a step back. “
Her Olympics are far from over, with her next competition scheduled in the women’s all-around final in two days.
“We’ll see around Thursday,” she said, echoing the team’s statement that she “will be assessed daily to determine medical clearance for future competitions.”
Biles added, “We’re going to take it one day at a time and see what happens. I’m just trying to prepare for the next test. I tried to go there for the team and they stepped up to the plate.
“It’s very unfortunate that it has to happen at this point because I really wanted these Olympics to go a little better. But again, take it one day at a time. We’ll see how the rest goes. “
The record american athlete had a difficult start in the final, where the we was looking to get a third straight olympique Title.
Follow the Daily podcast on Podcasts Apple, Google Podcasts, Spotify, Streamer
The 24-year-old hopped onto her planned Amanar safe, opting for an easier vault in the air, then struggled to land.
The rare misstep allowed the gymnasts from Russia to open up a one point lead after the first rotation and they continued to win.
The GB team won a historic bronze after having edged Italy in the last rotation.
After snuggling up with her coach, she left the competition field with the team doctor before returning a few minutes later with her right leg rolled up.