Newcastle United have been dealt a fresh injury blow following Saturday's 3-0 win over Wolverhampton Wanderers at St James' Park.
The Magpies climbed back up to eighth and leapfrogged Wolves in the table with goals from Alexander Isak, Anthony Gordon and Tino Livramento.
During the match, Kieran Trippier was forced off with a calf issue though the severity of the injury is not clear at thsi stage.
"Kieran felt something in his calf and had to come off the pitch," Howe told The Gazette. "That is a concern for us, although I don’t know how serious it is at this moment."
Next up for The Magpies is a trip to Chelsea on Monday, March 11 (8pm kick-off). While Trippier is a fresh concern for the match, Newcastle have been boosted by the recent returns of Isak, Joe Willock and Elliot Anderson from injuries.
Matt Targett could also be back in contention for the trip to Stamford Bridge after four months out with a hamstring injury.
Speaking ahead of the Wolves match, Howe said: "Matty might need a little more time to be back involved with the squad just due to the fact his injury was a muscle injury. But he is back training with the group."
Chelsea beat Newcastle on penalties in the Carabao Cup quarter-final at Stamford Bridge back in December and currently sit 11th in the table, four points behind The Magpies with a game in hand.
Here is Newcastle United's current injury list and expected return dates...
5. Callum Wilson (chest)
Wilson managed to complete 90 minutes at Nottingham Forest but ended the match with his arm in a makeshift sling. It has since been revealed the striker suffered a pectoral injury in his chest. Has undergone surgery and is back out on the grass. Expected return: Burnley (A) - 04/05 | Getty Images
6. Miguel Almiron (knee)
Forced off just 10 minutes after coming on against West Ham with a knee issue which will keep him sidelined for around a month. Expected return: Burnley (A) - 04/05 | Getty Images
7. Joelinton (thigh)
Joelinton picked up a thigh injury during Newcastle's 3-0 win over Sunderland. He was able to briefly play on before being withdrawn. Eddie Howe has ruled the Brazilian out for at least six weeks but surgery on the injury is likely to keep the midfielder out until the end of the season. Expected return date: Brighton (H) - 11/05 | Getty Images
8. Lewis Miley (back)
Lewis Miley injured his back on international duty. There were fears his season could be over, but he may still be able to play a part of the remainder of the campaign. Expected return: May 2024 Photo: Stu Forster/Getty Images