Alan Curbishley has confirmed that Craig Bellamy will be sidelined for at least six weeks after undergoing surgery.
However, the West Ham medical team finally decided there was no other option and the Welshman went under the knife on Wednesday.
Bellamy is now likely to miss at least eight more matches before making a possible return in early April.
"We have got some more bad news," Curbishley told Sky Sports News.
"Craig has had an operation on this groin injury and stomach injury that he's had for some time.
"We've been trying all other routes to try and get him fit but in the end we've had to go for the operation.
"He'll be out I think for about six weeks and we hope it's successful. He's had a tough time of it over the last six months."