Has your lo been very active? started rolling over, crawling, ect? My LO has always spit up. At about 5 months he started spitting up ALOT! Took him to the dr. Cuz it worried me. He was absolutely perfect. Dr said it may be that he's moving around a lot. He had started crawling about that point so his milk was getting all shaken up in his belly. I started putting him in basically any kind of stationary stand up activity center and it has helped a lot! If your LO is still having a problem maybe you could try standing him up