What is a hard lump behind the left ear?

Swollen lymph node, often from infection. Nothing to worry about. Give it a wk or two The Internet is no place to diagnose medical problems you are having If you are worried you should go and consult a qualified medical practitioner (a doctor) who will examine you and tell you what is wrong.

After you know what the problem is caused by by all means research the problem on the Internet but this site can not provide you with a diagnosis.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.