Itching of the ears can be the first sign of an ear infection, but if the problem is chronic, it is more likely caused by a chronic dermatitis of the ear canal. Seborrheic dermatitis and eczema can both affect the ear
Other probable causes are wax
in the ear
, allergy, excessive sweating, etc.
Ii is advisable to consult an ENT specialist to look for the actual problem.
"Aim should be to treat the cause, rather than the symptom".