Following a supposed handball by Guy Demel inside the Hammers penalty area and a clash between Ryan Shawcross and Andy Carroll, the Potters boss bemoaned his side's luck
Guy Demel appeared to use his hand while attempting to control the ball inside his own area before Ryan Shawcross tumbled to the ground under pressure from Andy Carroll in the lead up to Jack Collison’s winner.
And, while Pulis believes his side should have been awarded a penalty, he was left more aggrieved by the perceived foul on his captain.
"Their goal is really hard to take - Carroll actually pulls Ryan down and we are disappointed with that and we could have had a penalty in the second half," he told reporters.
"We thought it was a definite handball. But like the offside rules, handball is a very ambiguous topic at the moment.
"They can say it is handball for one thing and not for something else in a similar situation. You are hoping that will give you a break but we didn't get a break."
The loss was only Stoke’s second at home in the Premier League this term, while West Ham move level on points with Pulis' side in 12th.