The human ear eustachian tube opens in the pharynx. When yawning and swallowing, the eustachian tube opens and a small amount of gas enters the middle ear to maintain the balance of air pressure inside and outside the eardrum. The eustachian tube is short and straight, so inflammation after a cold can easily spread to the eustachian tube and cause otitis media, resulting in ear pain when the patient has a cold. Treatment should be combined with drugs, such as Qing Kai Ling and cephalosporin for treatment. If the ear disease is still present after the cold is cured, you can go to the ENT department of the hospital for examination and treatment. Do a good diet regimen, consume less fried and stimulating food, supplement vegetables and fruits, drink more water, and do outdoor exercises to enhance resistance.