Earache when taking high speed train may be caused by noise stimulation, air pressure change, ear inflammation and other factors, choose general treatment or medication according to the cause. 1. Noise stimulation: If the patient is sensitive to noise stimulation, noise stimulation can cause earache when riding high speed train, but the pain is usually not intense. You can try to wear earplugs to isolate the noise stimulation. 2. Air pressure change: the speed of high-speed rail is relatively fast, especially when passing through tunnels and other confined spaces, the air pressure in the compartment will fluctuate greatly, and if the patient’s Eustachian tube is dysfunctional at this time, it may lead to pain caused by pressure imbalance in the middle ear. You can take the initiative to do chewing and swallowing to promote the opening of the Eustachian tube, and in severe cases, you can use decongestants for short-term nasal drip treatment. 3. Ear Inflammation: If you suffer from otitis media, you may just encounter the aggravation of otitis media when you take high speed train, and then you may have earache symptoms. The phenomenon of earache when taking high-speed train should go to the hospital in time after getting off the train and be treated under the doctor’s guidance to avoid the aggravation of the condition.