I Am Having A Hard Time Expressing Emotions, Even Though

I am having a hard time expressing emotions, even though I want to. It's almost as if I can't cry. Maybe my tear ducts don't work? Is this a psychological problem? or is their a pill to help induce emotions, mildly that is. My tear ducts will produce tears naturally, like if there's smoke or I'm cutting onions, but other than that, nothing.