Demi Lovato has lashed out at cyber-bullies.

The actress recently spent a stint in rehab to get treatment for bulimia and bipolar disorder, and said people’s judgmental views of eating disorders make it so hard to get better.

“I wish there wasn’t so much pressure on society to be thin. It makes recovery so much harder,” Demi Tweeted this weekend. “My heart goes out to any and all women who deal with this daily battle. I can’t stand it when people make fun of the diseases so many people struggle from.”

She added: “I can’t stand it when people make fun of the diseases so many people struggle from. Not something to joke about,” Demi continued. “Along with making fun of illnesses or diseases, doing it over the internet only makes you more of a coward. Not to mention you’ve performed the act of cyber-bullying, something that is equally wrong and unacceptable.”