It can be caused by a scratch, pimple, or bug bite, too. Signs of an outer ear infection can include: Your middle ear is an air-filled chamber that's separated from your outer ear by your eardrum.

Middle ear infection antibiotics "Infections in the middle ear, behind the eardrum, usually occur with colds or seasonal allergies … it usually takes oral antibiotics to clear them up," Wertz said.

Dr. Rebekah Hartfield explains the causes, symptoms, and treatments for ear infections in dogs, emphasizing the importance of ...