Friedman, speaking on Sportsnet, revealed that Nylander was suffering from a severe migraine, prompting medical staff to assess him for a possible concussion. He further noted that Nylander had switched to a tinted visor in 2022 to cope with "eye migraines" that had troubled him during games the previous season.
The American Migraine Foundation suggests that while migraines typically resolve within a day or two, the array of accompanying symptoms can extend recovery beyond a week. Given this, Nylander's potential return could be as early as game four against the Boston Bruins on Saturday.