The 24-year-old Dutchman was substituted in last week’s draw with Fiorentina and initial concerns were that the knee was again badly damaged.
“There’s a lot of speculation in the media about me and I would like to explain to all the fans what the real problem is,” said Strootman on his official Facebook page.
“In the match v Fiorentina I got a knock on my left knee.
“It’s bruised and therefore I should rest my knee for a couple of weeks.
“This gives me the opportunity to remove some scar tissue which has bothered me a bit after the last surgery and this will help me further in getting back to my old level.
“It’s nothing serious and I will be back on the pitch as soon as possible.”
Follow Allan Eccles on Twitter: @bookedforsim