This may be caused by the dog scratching it, or the dog may have been traumatized by a collision, or the wound may be infected. Parents should find out the cause in time, and it is best to check the dog's inner ear. Check to see if there are ear mites or bacterial infections. It is best to clean the dog’s ears to avoid worsening of the condition.

Tip:

Puppies with big ears are prone to ear canal diseases. Parents should clean their ear canals every day when raising them.