Kristen Bell reveals longtime battle with anxiety and depression

Kristen Bell is candidly opening up about dealing with mental health issues.

The 35-year-old actress reveals that she struggles with anxiety and depression in a new interview on "Off Camera with Sam Jones," and says she's been on a prescription for years. Bell shares that her mother, a nurse, sat her down when she was 18 years old, and explained that there's "a serotonin imbalance" in their genetics.

"I've always had a really open and honest dialogue about that -- especially with my mom -- which I'm so grateful for, because you have to be able to cope with it," Bell says. "I mean, I present this very cheerful, bubbly person, but I also do a lot of work."

WATCH: Dax Shepard Reveals He Was Molested as a Child: 'I Was Like, It's My Fault'

"I got on a prescription when I was really young to help with my anxiety and depression and I still take it today," she continues. "I have no shame in that, because my mom had said to me, 'If you start to feel this way, talk to your doctor, talk to a psychologist -- see how you want to help yourself. And if you do decide to go on a prescription to help yourself, understand that the world wants to shame you for that, but in the medical community you would never deny a diabetic his insulin -- ever.' But for some reason when someone needs a serotonin inhibitor, they're immediately crazy or something. I don’t know, it’s a very interesting double standard that I don't often have the ability to talk about, but I certainly feel no shame about."

Bell, who says her grandmother was one of the first people they tested electroshock therapy on, also gets candid about other issues she is mindful about.

"I'm extremely co-dependent," she admits. "I shatter a little bit when I think people don't like me. That's probably why I lead with kindness, and I compensate by being very bubbly all the time, because it really hurts my feelings when I'm not liked. And I know that's not very healthy, and I fight it all the time."

"I changed who I was often," she says about her experience in high school. "I changed my interests based on what my friends liked, and I really didn't realize that until I was in my 30s -- that I had sort of changed for everybody."

WATCH: Ashton Kutcher and Dax Shepard Surprise Mila Kunis and Kristen Bell to Play 'Never Have We Ever'

Last November, the "Bad Moms" star opened up to ET about undergoing couples therapy with her husband, Dax Shepard.

"Our relationship wasn't perfect," Bell openly said, although the pair is definitely one of the most beloved couples in Hollywood. "We had a couple years of fighting and of growing pains and hating each other, then loving each other and going to couples therapy and we worked it out ... We earned each other."

Bell and Shepard have been married since 2013, and have two daughters together -- 3-year-old Lincoln and 1-year-old Delta. The couple certainly appears to be more in love than ever these days, making an adorable music video together in January of their vacation to Africa.