The Scotland international, whose cross led to Joe Willock’s equaliser in the 1-1 draw at West Ham, limped off in the 79th-minute and was replaced by Miguel Almiron.
It was once again another impressive display by Fraser, who has turned his Magpies career around under Howe after a poor opening 12 months on Tyneside.
The 27-year-old has started the last seven games for United. He’ll be assessed ahead of the trip to Brentford next weekend.
Eddie Howe on Ryan Fraser
“I don’t know at this moment in time,” Howe said, when asked if Fraser had picked up an injury.
“I think he said, as he was coming, that his hamstring was a little bit sore but we’ll see.
“It could be a bit of fatigue or cramp in there.”
Fraser and his teammates extended their unbeaten Premier League run to six matches, which has lifted the club four points above the drop zone.
The unbeaten run extends to six
Howe said: “We’re feeling good at this moment but we know football can change very quickly.
“It’s all about the next game now and I think the players are pleased with the run we’ve been on. Confidence and general performace levels have improved.
“We just need to remain very calm and focus on our training which has been a really level.
“No-one is getting carried away with themselves or becoming complacent because in this league, results can change quickly.