The 24-year-old, whose drastic weight loss spawned speculation she has an eating disorder, told Vanity Fair she is worried that young girls would model themselves on her tiny figure.
Her doctor vowed to help Richie if it turned out she was anorexic.
“I know I’m too thin right now, so I wouldn’t want any young girl looking at me and saying, ‘That’s what I want to look like’,” the Simple Life star said.
“I do know that they will, which is another reason I really do need to do something about it.
“I’m not happy with the way I look right now.”
Richie, the adopted daughter R&B crooner Lionel, blamed her weight loss in part on her break-up with fiancé Adam Goldstein, aka DJ AM.
“I had a bad breakup, and it eats me up inside when I’m upset about something,” said the star, who is now dating Goldstein again.
“I get really stressed out, and I do lose my appetite, but I do force myself to eat.
“I tried to put the weight on my way, eating burritos, but that wasn’t working, so I started seeing a nutritionist and a doctor.”
On the end of her friendship with hotel heiress Paris Hilton, Richie said: “We never had a fight”.
“I decided I didn’t want to be her friend anymore. We’re just two completely different people; we don’t have much in common.”