Wigginton was in NYU Medical Center after complaining during Wednesday night's game against Montreal.
He is expected to miss New York's road trip to Chicago, Los Angeles and
San Diego, and it's likely that he will be placed on the 15-day disabled list.
"He looked pale and weak when he came to the ballpark and then
he had dizzy spells during the game," manager Art Howe said.
Wigginton is batting .188 with two home runs and nine RBI.
Wigginton will be the third everyday Mets player to go on the 15-day DL. Left fielder Cliff Floyd was placed on DL April 12 with a strained right quadriceps. He was hurt while legging out a single in that day's game against Montreal. Second baseman Jose Reyes started the season on the DL due to a strained right hamstring.