Earlier this month, Heidi went under the knife and had her breasts reduced from an F cup to a D cup.
The former Hills star said she wished she'd never had them boosted, as they had caused numbness and pain.
And now she has admitted she regrets all her surgery.
Heidi started out as a fresh-faced young club promotor on the MTV reality show, but had completely transformed within three years. Famously, she had 10 surgeries in one day.
In an interview published following her recent breast reduction, Heidi told the Mail Online: "I definitely regret the surgeries that I have had over the years, I think I was so young and in such an unstable situation in my life with so much going on and so much pressure.
She added: "I listened to what other people said and let myself become really insecure and I had a doctor that made it sound really easy and a quick fix.
"If I had to go back and do it again I definitely wouldn't and I would not recommend that."
Heidi is married to her former Hills co-star Spencer Pratt and they recently celebrated their fifth wedding anniversary.
In January, the couple flew to the UK for a stint on Celebrity Big Brother and together they came second.
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