Is this normal or signs of infection after otoplasty ?

Thank you for your question.  Unfortunately it is difficult to determine without a photograph or physical exam, but since your symptoms changed between the second and third days after surgery, I would speak with your surgeon about your concerns, so that you can be seen and evaluated to make sure an infection is not occurring.  

When one ear alone is acting up it could be an infection.  Best to go and have your doctor check this. We remove all ear and head dressings at 24 hour and have patients wear simple head bands.    This makes observation much easier.  My Best,  Dr C