"He just needs to take some time off to get completely healed," Caps' general manager George McPhee said in a statement.
The Capitals would not identify the ailment.
The Capitals, second in the Eastern Conference, are all but assured of a playoff berth with three weeks remaining in the regular season.
Ovechkin ranks sixth in the league in scoring with 77 points (29 goals, 48 assists).
The left wing leads the Capitals in goals, assists, points and is tied for the lead with six power play goals.
(Reporting by Gene Cherry in Salvo, North Carolina_