Yes, Michael Jackson wore wigs and hairpieces later in life. The subject is often connected to the 1984 Pepsi commercial accident, where his scalp was burned during filming.
Why wigs became part of the story
Major scalp burns can affect hair growth and sensitivity. For a performer whose image was watched globally, wigs and hairpieces also helped maintain a consistent stage look.
Do not reduce the person to the wig
Jackson's hair changed over decades for many reasons: era, style, performance, medical history, and personal image.
Bottom line
Michael Jackson did wear wigs or hairpieces, especially later in life, and the best-known reason is tied to scalp injury and public image control.