Justin Bieber reveals he's battling Lyme disease

Justin Bieber has revealed he has been diagnosed with Lyme disease.

Bieber's opened up on the condition, which is caused by a tick bite, ahead of the release of his 10 part documentary series on YouTube and because he's had people contacting him about how he looks.

"While a lot of people kept saying justin Bieber looks like s..., on meth etc. they failed to realize I've been recently diagnosed with Lyme disease, not only that but had a serious case of chronic mono which affected my, skin, brain function, energy, and overall health," Bieber said.

"These things will be explained further in a docu series I'm putting on YouTube shortly.. you can learn all that I've been battling and OVERCOMING!!"

"It's been a rough couple years but getting the right treatment that will help treat this so far incurable disease and I will be back and better than ever NO CAP" Bieber concluded.

In March last year, Bieber announced he was taking a music hiatus to focus on family and health.