Forearm pain when doing curls. What to do now???

[mdouglass]

When I first started doing curls I used the straight barbell bars at my gym but quickly moved to the e-z curl bars since it was more of a natural movement by my arms. I did them for about 6 months as part of my routine before I started to get a sharp pain in my forearm from doing this exercise. Generally the pain would linger for a couple days after doing it. I switched to hammer curls (which don't hurt) using dumbbells but I don't feel like I get enough out of them in comparison. Are these hammer curls equally effective?

BTW, the pain is in the inside of my forearm when my palms are face up. It is a sharp pain about 40% between my hand and elbow right on that bone. Any way to help this?