Michael Jackson entered hospital suffering from dehydration and weight loss after his child molestation trial ended last month, according to his lawyer Tom Mesereau.
While the Thriller star was acquitted on all charges brought against him, he has yet to make a public appearance since he emerged from the Santa Maria, California, courthouse, and Mesereau has revealed that Jackson needed treatment.
He told BBC radio in an interview: "Michael Jackson was ill from time to time. In fact, people didn't realise he actually entered the hospital after the verdict.
"He was dehydrated, he had lost a tremendous amount of weight, he was having trouble keeping food down, he was terrified about what was going happen to his children and he had a recurring back problem."
Jackson, who appeared frail throughout his court battle, held up proceedings briefly during the trial when he entered hospital for treatment of the flu.
On June 13, Jackson was acquitted of molesting a 13-year-old boy in 2003 as well as plying him with alcohol and conspiring to abduct the boy. The singer faced nearly 20 years in prison if convicted.