Thanks for your qyery.
needs to be rules out as he is irritable,excessively crying and pulling his right ear as well.
I advise you to have pediatric consultation.In the meantime give him paracetamol
for pain relief.for eczema
lotion 2 to 3 times a day ,give one dose of benadry as per dosage till you see your doctor.
Your son will be fine.