Dr Dirk Heinrich said that severe colds require consultation with a doctor before traveling by plane, because they may lead to the incidence of otitis media, due to the accumulation of fluid behind the eardrum. The German nose, ear and throat doctor said those with colds had trouble equating pressure while traveling by plane.
The problem can be met with some movements during take-off and landing, such as yawning, swallowing, and chewing. This helps open the astacious canal, the pharyngeal tube that extends from the middle ear to the nasal pharynx.
The pressure can also be equated with the technique of “divers”, where the mouth and nose are closed, and the air is compressed without removing it. The air is then compressed through the Astacius channel to the middle ear.