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Are you suffering from an allergy?
If the ear pain is arising during the opening of the mouth at ear area it may be arising from temporomandibular joint. Middle ear infection or eustachian tube block may also give rise to pain in the ear. But in your history, you did not mention clogged ears.
Tremors may be due to some decongestant drugs or beta agonists or it may be due to familial tremors. Avoid cool drinks and cold water, avoid allergens. Use water vapor inhalation.
I suggest taking tablet Alday-DC (Cetirizine) twice a day for five days.
Consult your specialist doctor, discuss with him or her and start taking the medicines with their consent.
If symptoms not improved, please consult your ENT specialist. He will examine and treat you accordingly.
For more information consult an internal medicine physician online --> https://www.icliniq.com/ask-a-doctor-online/internal-medicine-physician