Absolutely. The three areas that are most overwhelmed by refugees and IDPs are the Kurdistan region, Jordan, and Lebanon.
In Lebanon, probably the only thing that's prevented this from bringing Lebanon back into civil war is the fact that the Lebanese still have so many memories of the last civil war, and they're just too tired to go there.
In Jordan, there is a risk of destabilizing the monarchy, especially if there's no way forward and there's no adequate government set up in areas that are liberated from ISIS. The people won't go back; they don't see a way back, and they end up stuck in camps. They're playing a role similar to that of the Palestinians in south Lebanon in the 1970s. They were in the camps and they had no real future, and they ended up inserting themselves into Lebanese politics. It broke the system down.
So, yes, we do have risks.