you should check whether you have dandruff in your scalp or not because the source I think lies there. you should wash your scalp twice per week applying topical itroconazole lotion, massaging and forming lather like shampoo keeping for ten minutes and then wash. This will reduce your scalp dandruff and hence your ear will also see remarkable improvement. Take an anti histamine
at night and apply some topical antifungal
cream in combination with mild steroid like miconazole
daily at night for reduction of itchy and scaly ear.