TikToker Dixie D’Amelio revealed Thursday that she has been diagnosed with premenstrual dysphoric disorder.

In an Instagram live, D’Amelio said that the disorder “really affects your moods and your behavior and many different parts of your life.”

The 21-year-old made the revelation after dealing with health issues for “the past seven years.”

“I kind of took a break from social media the past two weeks. I wasn’t feeling great and not really sure why,” D’Amelio said.

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“I didn’t realize how much it was affecting me until I got to this point I was in last week. But it really disrupts my life and my attitude and my personality and my relationships and just who I am as a person,” she said, adding that it also affects her mental health. “And it’s very obvious to see in these next couple episodes of the show.”

“I have never been so low and just down. And having no idea what was wrong with me was very alarming,” she said. “I just felt like I had no control over my body or mind and I had no idea what was wrong but it would turn on and off like a light switch.”

PMDD is a “severe, sometimes disabling extension of premenstrual syndrome (PMS),” which can cause extreme mood swings, according to the Mayo Clinic. The disorder can disrupt daily life and damage relationships.

A person dealing with the disorder may experience symptoms like sadness, anxiety, tension, extreme moodiness, irritability or anger.

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The American singer and social media personality was born in Norwalk, Connecticut. In 2020, she starred in the YouTube web series Attaway General. She hosts a talk show on YouTube called The Early Late Night Show.

In 2020, she signed a record deal with HitCo Entertainment and began releasing her own music.