11 yr old has terrible dandruff in really big flakes more like cradle cap ( which he had for ages as a baby). This has been going on for about a year - will get slightly better and then flare up again. Have tried usual off the shelf shampoos (H and S, T Gel etc) and also prescription shampoo (Ketoconazole 2% called Ketopine) Nothing is working and he feels awful about it.
Does anyone have any experience of this and any ideas that would help to get rid of it?