Fogden missed the 1-1 draw with Colchester on Saturday and is likely to be sidelined for the final two games of the season.
The 24-year-old has undergone a scan on the problem area and is awaiting the results, which he should receive before the end of the week.
Cherries caretaker manager Paul Groves told the club's official website: "Wes took a tumble on Thursday and landed awkwardly on his shoulder.
"Whether he's going to miss the rest of the season yet I don't know. We will have to have more extensive examinations to find out how bad it is."