Colds can cause earache. As the nasopharyngeal cavity and the inner ear drum chamber are connected through the Eustachian tube, pathogens such as bacteria and viruses can enter the ear through the Eustachian tube after a cold, which can lead to ear infections. In addition, the Eustachian tube can also be blocked by hypertrophy of the nasal turbinate, which can lead to dysfunctions of the Eustachian tube, causing otitis media and other illnesses, resulting in symptoms such as pain inside the ear. If the symptoms of ear pain are mild, you can leave it untreated for the time being, drink plenty of water, eat a light diet, and pay attention to observing the changes in your condition. If the condition worsens, consult a doctor. Can follow the doctor’s instructions topical external drops of oxfloxacin ear drops, levofloxacin ear drops, etc. to control and treat the disease. It is recommended that patients seek timely medical examination and use medication under the guidance of the doctor to actively treat the disease and avoid aggravation of the condition.