The 26-year-old had been taking part in a game at an outdoor centre near Croydon on Saturday (20 August).
She went to her doctor's surgery on Monday, where it was discovered one of her implants had been torn apart.
"We respectfully ask that any ladies with surgical breast implants notify our team at the time of booking," says a statement on UK Paintball's website.
"You will be given special information on the dangers of paintballing with enhanced boobs and asked to sign a disclaimer.
"You will also be issued with extra padding to protect your implants while paintballing."
The woman involved hasn't been named. Read more on BBc
