Getty Images

After Kid Cudi announced on Wednesday that he had admitted himself into rehab, the hip-hop artist started a conversation about the stigma around mental health. "Yesterday I checked myself into rehab for depression and suicidal urges," he wrote in a Facebook note to fans. "I am not at peace. I haven't been since you've known me." He said "sorry" four times in his letter.

On Twitter, black men started using the hashtag #YouGoodMan to talk about anxiety, depression and mental health in general, coming up to support Cudi and to help get their own stuff off their chests. Buzzfeed has a good article about it.

Celebrities and Cudi's famous friends also gathered around him on Twitter, expressing their own thoughts and prayers for the actor. Here are just some of the people who have come to Cudi's side, including Pete Wentz, who himself has bipolar disorder, and Zayn Malik, who has canceled appearances due to his anxiety.

Listen to our latest Back of the Class podcast, where we discuss Kid Cudi's upcoming album: