 [ Symptoms ] my scalp itches severely even after washing occasionally gets hard crusty build ups and my hair is weak and breaking i have eczema that has always only been able to be treated with a prescription my scalp gets really itchy and dry and my hair breaks off in patches what could this be [ Disease ] your scalp issues cannot be accurately diagnosed over the internet based on description a medical provider would need to see and examine you in order to make this determination you could have seborrheic dermatitis or perhaps a dozen other skinhair conditions my suggestion is for you to see a good dermatologist and get it diagnosed and treated by an expert