I keep having a intermittent slight sharp pain in my inner left arm above the inner elbow. what is it?

Diagnosing...: ...muscle & joint problems require more information than you're able to provide here. This includes: how long the problem's been going on, what makes it better or worse, what activities you do that may stress the elbow area and, of course, a physical exam. Sometimes X-rays are helpful. If it's really bothering you and/or for a long time, I recommend you seek medical care. Best wishes!