Children get ear pain after flying, what should be done

Patient's question:

Patient Age: Five years
Condition Description: On October 1, 2009, the patient flew on an airplane, experienced ear pain, and a check-up revealed no issues. They were advised to blow up balloons. Currently, the pain occasionally returns.
Past Treatment and Effect: Blowing up balloons was recommended, and the patient did so for several days but did not persist with it.
Desired Help: Should the patient go to a large hospital for further examination? If everything is fine, what methods can alleviate the pain? Thank you.

Doctor's answer:

Medical Analysis: The so-called "airplane ear" is actually Meniere's disease, with retracted eardrum. Closing the mouth and blowing up can alleviate it to some extent. Meniere's disease is an inner ear disorder characterized by the accumulation of fluid in the membranous labyrinth. The primary clinical manifestations of this condition include sudden vertigo, tinnitus, hearing loss, or nystagmus. Vertigo has distinct episodes and intermissions.
Advice: Intravenous fluid is one treatment option. Clinical evidence shows that it can provide relief for some patients, while most do not experience significant improvement. Adding diuretic medications to the fluid can enhance its effectiveness. Intravenous fluids can alleviate vertigo symptoms by temporarily reducing the pressure in the labyrinthine lymphatic circulation of the balance organ. Therefore, intravenous fluid therapy serves as a symptomatic treatment.