Left ball like wrist bone swollen and bruised. pain up the left side forearm. could it be fractured or just a sprain?

Could be either: You need to be seen by a doctor and it's likely you will need an xray.

See below: This is a problem that requires a face-to-face meeting with your doctor. In that meeting, your doctor will listen to you, perform a throrough examination and possibly order labs or other tests. Based on this information, he/she will be able to tell you what's wrong and what to do about it.

Have it evaluated: Your pain could be as a result of many different things. One would need to do a thorough history and physical exam and possibly some radiology exams to determine the exact cause. Have it evaluated by a professional to see if you have fractured it of if it is just a soft tissue injury such as a contusion or a sprain. You may have injured nerves, blood vesicles, muscles, ligaments or tendons.