Colton Haynes took to Twitter yesterday to open up about a problem he has suffered from for more than fifteen years — anxiety.

The actor first shared an article titled "Scientists Show How Anxiety May Affect Social Status," and then followed up with a series of tweets to his fans about the issue.

"For those of you who are suffering with intense anxiety...ur not alone. It's been a constant struggle for me since 5th grade. It's a battle. Anxiety had put me in the hospital a countless amount of times. Whether it be fainting, hyperventilating, or seizures...I've been through it.Just know ur not alone & it affects more ppl than you would ever know. We can overcome this. We can fight thru it & will.

I've quit jobs because of anxiety, flaked on social events, family gatherings, birthdays, important movie/work tests. Its a serious problem. Be there for those who struggle with anxiety & realize it's a serious disorder. It's not a case of "being dramatic"...it's a life long struggle. Love those suffering. Anxiety has caused me to be extremely agoraphobic & live in constant fear of leaving my house at times. Ur not alone."

According to the American Psychiatric Association, anxiety disorders are the most common of mental disorders, affecting more than 25 million Americans.