Elbow pain

Hello everyone, here´s my problem for the past couple of months I have been experiencing some pain in my right elbow.  At first it bothered me completely in all excersises so i laid back and rested.  Now I'm able to do all chest and shoulder excersises.  My only problem comes when doing lying tricep extensions, I just can´t do the movemet, too much pain, tried it in the extension machine and hurt as well.  My triceps are a weak point and don't want to stop training them, what can I do? with what excersise can I substitute the tricep extensions?

Perhaps kickbacks would reduce the elbow strain??