My hearing is gone in my left ear and it is painful?

You probably have an ear infection. It usually goes away on its own but if it doesn't then you need to see a doctor. Another possibility, given that you were rubbing it when you went deaf, is that it's been sealed up with wax. Go to the drugstore and get an ear wax cleaning kit. This features drops you put in your ear. You leave them there for 15 minutes. Then you go to the sink. The kit comes with a bulb or syringe, which you fill with WARM water and then put in your ear c and shoot it out, which cleans out your ear of both the drops and the wax! Shoot the water from the bulb multiple times. You won't hurt your ear doing it. If, after you do that and get all the wax out, your ear still hurts, then it's an ear infection.