iPad Finger

My finger hurts, specifically my right index finger. It mostly hurts when I tap on my iPad. I can't see anything on it, but it feels more like a bruise than a blister. I have been trying to tap with other fingers or using my finger nail. I haven't really gotten the hang of touch-typing on the iPad so I have only been using the one finger. If I'm going to type, I'll have to try to do more touch-typing. Otherwise, I'm afraid I'm going to start avoiding the iPad, even for typing short messages.