Justin Bieber has told fans he has been battling Lyme disease.

The singer said he will go into more detail in his upcoming docu-series.

He wrote on Instagram: "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.

"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!!"
