Justin Bieber reveals struggles with Lyme disease and chronic mono in Instagram post

Justin Bieber has shed light on his struggles with Lyme disease and chronic mono in an Instagram posted on Wednesday. The pop singer was confirming a TMZ report of his recent Lyme disease diagnosis — Bieber said the illnesses have affected his "skin, brain function, energy, and overall health" over the past few years.

In the full letter, which you can read below, Bieber promises more information in his upcoming YouTube documentary series Justin Bieber: Seasons. Last week, Justin Bieber shared "Yummy," his first new solo single in two years.