I have gone through your query and understood your concerns. I will advise you to visit a surgeon for this not dermatologist
. It must be an abscess
. Usually lump behind ear indicates swollen lymph
node due to local infection but as you have mentioned about itching it seems like abscess which is not a correct diagnosis but only after examination we can decide about this. Ok, for now you can take tab.avil
for itching. Thank you.