Welcome to HCM.
Understanding your concern.
As per your query you have clicking sound in your ear after flight . Well this some times occur due to pressure difference in flight . The condition is known as ETD (Eustachian tube dysfunction
When people with upper respiratory infection
, post nasal drip
or sinusitis travel in flight mucus from throat area enter the eustachian tube (tube that connect upper throat to middle ear and balance pressure of middle ear ) due to pressure difference .
This causes clogging of eustachian tube and leads to ETD .
I would suggest you to consult ENT specialist
(ear,nose,throat) for proper examination and rule out other causes like ear infection . Doctor may examine nasal passage , back of the throat ,ear drum to confirm the diagnosis .
Doctor may prescribe decongestants , mucolytic agent
like ambroxol , antibiotic course for infection and may also implant pressure equalization tube .
For now give warm compresses to ear several times a day and keep you ear dry .
Hope your concern has been resolved.
Get Well Soon.
Dr. Harry Maheshwari