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If there is an itch both in the ear and in the soft palate, then it could be due to either fungal infection or due to some allergy. Extreme dryness as in Sjogren’s syndrome too could be a cause. Do discuss this with your doctor and get yourself examined.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
I have no idea what causes it, but have had the same issue from time to time. In our household we use mint (breathmints) for sore throat or nasal drainage when dealing with colds or allergies and found that also helps to get rid of the itching sensation.