Pogba has started just four of United’s past 11 games in all competitions after a worrying dip in form.
Mourinho, whose team host Swansea City Saturday, is at a loss as to why Pogba is struggling, saying perhaps the France international knows.
“Ask him. Ask him when you get a chance what he thinks about it,” he told reporters.
Pogba, 25, suffered a hamstring injury in September, seeing him sidelined for two months.
However, Mourinho said that setback could not be used as a reason for Pogba’s form.
“It’s nothing to do with his injury. His recovery was good,” he said.
“This season and also last season [he had a bad injury]. But I think he’s very fine after the injury.
“It was a difficult injury, it was an injury that other players, other clubs, other medical assessments – they end in surgery.
“His option – with the medical opinions – was not to go to the surgery table and his recovery was really, really good.
“So I think he is more than fine in relation to his recovery from the injury which is an area sometimes where you have a recurrence. In his case, not at all.”
