Yesterday I got slapped hard in my left ear. Since then I am unable to hear clearly feels like waterblocked but its not. And also today evening I went to doctor for medicine when he checked my ear found little blood inside the hole, is this a permanent damage to my ear.

What did the doctor say?

This is not a diagnosis. It's a POSSIBLE one. Ruptured Eardrum: Symptoms, Treatments, and Recovery (http://www.webmd.com/pain-management/ruptured-eardrum-symptoms-and-treatments)