"When I was a teenager, I battled some severe depression," she tells Dr. Monica Shahbaznia. "I attempted suicide a couple times. I went to a mental institution ... drugs, overdosing, slitting wrists, all that stuff."
The 30-year-old TV personality states the reason for her behavior was due to not getting the love and support she yearned for from her distant mother.
"I was left on my own," she says, holding back tears. "I was a young f------ girl. All I wanted was for my mom to say, 'I love you, and I'm here for you.' I never got that."
For more on Kendra's life, see the photos below:
Kendra Wilkinson says she attempted suicide as a teen, was institutionalized
LOS ANGELES, CA - JULY 29: Playboy Models Holly Madison, Bridget Marquardt and Kendra Wilkinson attends the unveiling of Holly Madison's ''Girls Next Door'' jewelry collection at the Kitson Los Angeles boutique on July 29, 2006 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
HOLLYWOOD - JUNE 12: Publisher Hugh Hefner with Girls Next Door Kendra Wilkinson, Holly Madison and Bridget Marquardt in the audience during the 36th AFI Life Achievement Award tribute to Warren Beatty held at the Kodak Theatre on June 12, 2008 in Hollywood, California. The show will air on USA Network at 9PM PST on June 25, 2008. (Photo by Frazer Harrison/Getty Images for AFI)
BEVERLY HILLS, CA - SEPTEMBER 06: Playboy Model Kendra Wilkinson of 'The Girls Next Door' attends National Lampoon's A Night of Fantasy with The Girls Next Door & Ludacris at The Playboy Mansion on September 6, 2008 in Los Angeles, California. (Photo by C Flanigan/FilmMagic)
ATLANTIC CITY, NJ - AUGUST 30: (Left) Bridget Marquardt and (Right) Kendra Wilkinson from 'The Girls Next Door' pose for photographs before entering The Pool at Harrah's on August 30, 2008 in Atlantic City, New Jersey (Photo by Tom Briglia/FilmMagic)
LOS ANGELES, CA - NOVEMBER 15: 'The Girls Next Door' reality series star Kendra Wilkinson attends a signing of 'Playboy Cover to Cover: The 50s' at Barnes & Noble Booksellers at The Grove on November 15, 2007 in Los Angeles, California. (Photo by David Livingston/Getty Images)
Holly Madison, Bridget Marquardt and Kendra Wilkinson (Photo by Tony Barson/WireImage)
LOS ANGELES, CA - AUGUST 15: (L-R) Girls Next Door Kendra Wilkinson, Bridget Marquardt, Playboy publisher Hugh Hefner and Girl Next Door Holly Madison attend Playboy and Stoli's celebration of the September cover appearance and pictorial for 'The Girls Next Door' on August 15, 2006 at the Social Hollywood in Hollywood, California. (Photo by Michael Buckner/Getty Images for Playboy Enterprises, Inc.)
LOS ANGELES, CA - AUGUST 3: Playboy Publisher Hugh Hefner, poses with Kendra Wilkinson, Bridget Marquardt and Holly Madison at the 'Hugh Hefner And the Girls Next Door' DVD signing at Tower Records on August 3, 2006 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
LAS VEGAS - FEBRUARY 18: 'Girls Next Door' cast member Kendra Wilkinson attends the 2007 NBA All-Star Game 'Diddy' After Party at the Rain Nightclub in the Palms Hotel and Casino on February 18, 2007 in Las Vegas, Nevada. (Photo by Ray Tamarra/Getty Images)
LOS ANGELES, CA - APRIL 06: Kendra Wilkinson is seen on April 06, 2014 in Los Angeles, California. (Photo by Chinchilla/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - JULY 17: Playmate Kendra Wilkinson attends the panel discussion for 'The Girls Next Door' during the E! Networks presentation at the 2005 Television Critics Association Summer Press Tour at the Beverly Hilton Hotel on July 17, 2005 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)
WEST HOLLYWOOD, CA - APRIL 05: Football player Hank Baskett, Hank Baskett IV, TV personality Kendra Wilkinson, Catriona McGinn, Michael Gosselaar and actor Mark Paul Gosselaar attend Safe Kids Day Los Angeles 2014 at The Lot on April 5, 2014 in West Hollywood, California. (Photo by John Sciulli/Getty Images for Safe Kids Worldwide)
WEST HOLLYWOOD, CA - APRIL 05: TV personality Kendra Wilkinson, Hank Baskett and Hank Baskett IV arrive at Safe Kids Day at The Lot on April 5, 2014 in West Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
WEST HOLLYWOOD, CA - APRIL 05: Hank Baskett IV, Kendra Wilkinson, and Hank Baskett attend the Safe Kids Day at The Lot on April 5, 2014 in West Hollywood, California. (Photo by Jason Merritt/Getty Images)
BEVERLY HILLS, CA - APRIL 08: TV Personality Kendra Wilkinson attends the Cedars Sinai Sports Spectacular Women's Luncheon at the Beverly Hills Hotel on April 8, 2014 in Beverly Hills, California. (Photo by John M. Heller/Getty Images)
LOS ANGELES - JUL 13: Hank Bassett, Kendra WIlkinson arriving at the 2011 ESPY Awards at Nokia Theater at LA Live on July 13, 2011 in Los Angeles, CA
hank baskett and kendra...
Hank Baskett, Kendra Wilkinson at the 2011 Divine Design Gala, Beverly Hilton Hotel, Beverly Hills, CA 12-07-11
Hank Baskett and Kendra Wilkinson at Cheryl Burke's Birthday Celebration, BoHo, Hollywood, CA. 05-02-11
Hank Baskett, Kendra Wilkinson at the "Scarface" Blu-Ray DVD Worldwide Launch Party, Belasco Theatre, Los Angeles, CA. 08-23-11
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Sadly, Wilkinson isn't the only former Playboy model that has once considered suicide. Her Girls Next Door costar, Holly Madison, opened up about her dark moments in her tell-all memoir Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny.
"Life inside the notorious Mansion wasn't a dream at all -- and quickly became [Holly's] nightmare," a press release for the novel stated. "After losing her identity, her sense of self-worth, and her hope for the future, Holly found herself sitting alone in a bathtub contemplating suicide."
Despite the fact these two have been through similar situations, their relationship has taken an ugly turn. In another promo for Wilkinson's show, she slams Madison for writing "disgusting" lies about Hugh Hefner in the memoir.
"What Holly is saying is extremely false," the model says in the clip. "I'm like, 'Where did this s--t come from?'"
Hefner has denied Madison's accusations, saying the 35-year-old, who broke up with him in 2008 after five years together, rewrote history.
"Over the course of my life, I've had more than my fair share of romantic relationships with wonderful women. Many moved on to live happy, healthy and productive lives, and I'm pleased to say remain dear friends today," the 89-year-old told ET in a statement. "Sadly, there are a few who have chosen to rewrite history in an attempt to stay in the spotlight. I guess, as the old saying goes: You can't win 'em all!"
Watch the video below to hear more of Wilkinson's thoughts on Madison's book.