I went to the doctor today because I thought I I had an ear infection. The doctor said my ear looks fine. I have swelling behind the left ear and sever sharp pain. She looked up tenderness to the mastoid bone on the Internet and came up mastoitis. She gave me amoxicillin twice a day for 10 days. After looking on the internet it looks like mastitis is more sever then I thought. And my concern is that i may need more treatment than subscribed. I don't believe I had an ear infection which is usually what causes this so maybe she misdiagnosed me. But I want to know if I should be concerned and get a second opinion.