5 month old pulling his hair and scratching his head

Frances

So I am abit worried about my little boy, when he gets upset, tired or irritable he is pulling his hair and scratching his head. He leaves scratch marks on his head when he does this. We thought it may have been eczema so we have changed his bath stuff and put cream on the area he scratches. Has anyone else dealt with this? Is this normal or should I be speaking to a paediatrician?