Following a brief break from social media, TikTok influencer Dixie D'Amelio opened up to fans about a health condition she has been struggling with for the past seven years.

During an Instagram Live session, D'Amelio revealed she was diagnosed with premenstrual dysphoric disorder (PMDD).

The Mayo Clinic describes premenstrual dysphoric disorder as a severe and sometimes disabling extension of premenstrual syndrome (PMS).

PMDD causes extreme mood shifts that can damage relationships and disrupt daily life.

"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 explained.

The "The D'Amelio Show" revealed her condition will be noticeable in the second season of her reality show.

"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. "And it's very obvious to see in these next couple episodes of the show."

Although researchers have not learned the cause of PMDD, the condition as well as PMS are linked to underlying anxiety and depression.

D'Amelio noted that the condition has taken a toll on her mental health.

"I have never been so low and just down. And having no idea what was wrong with me was very alarming," she shared. "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."

Those diagnosed with premenstrual dysphoric disorder and premenstrual syndrome may experience fatigue, bloating, changes in sleep and eating habits, and breast tenderness.

However, notable symptoms of PMDD include anxiety or tension, marked irritability or anger, extreme moodiness, or sadness or hopelessness.

While D'Amelio is relieved the diagnosis provided answers about the changes in her body, she is still learning about her condition.

"I'm feeling better now, and I will probably be going through the same thing next month and the month after that," D'Amelio said.

Symptoms of PMDD and PMS typically start seven to 10 days before the period begins and will continue into the first few days of the period.

Premenstrual dysphoric disorder can be treated in a variety of ways, including with antidepressants, diet and lifestyle changes, birth control pills, and herbal remedies.

TikToker Dixie D'Amelio
In this screengrab, Dixie Damelio and Charli Damelio speak during Graduate Together: America Honors the High School Class of 2020 on May 16, 2020. Getty Images/Getty Images for EIF & XQ