Justin Bieber has been battling Lyme disease.
The 25-year-old singer revealed on Instagram on Wednesday that he has been suffering from the infectious disease - which is spread by ticks - and said he would be explaining his battle further in his upcoming YouTube documentary series, 'Justin Bieber: Seasons'.
Justin also claimed to have fought off "a serious case of chronic mono", and said he was working hard to "overcome" his ailments.
Sharing a screenshot of a story posted by TMZ that broke the news about his Lyme disease diagnosis, he wrote: "While a lot of people kept saying justin Bieber looks like s**t, 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.
"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 (sic)"