The singer said he plans to explain the depth of his struggle in a coming YouTube series.

The singer Justin Bieber revealed Wednesday that he has been diagnosed with Lyme disease in an Instagram post that called out people who have made comments about his appearance in recent months.

After TMZ reported the news, Bieber, 25, posted a screenshot of the article with caption saying people who had said he looked like he was on drugs “failed to realize I’ve been recently diagnosed with Lyme disease.”