Answer:
Sharp pain inside the ear can be normal when the altitude changes that include changes in the air pressure.
The only time sharp ear pains get bad is when you have an ear infection which can include ringing in the ear. Sometimes an ear infection doesn't cause sharp pains in the ear it can be caused by a common cold. It usually goes away on its own but if it doesn't they seek medical help to get information about how to get rid of the pain or follow the following steps:
Hope this helped :)