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?
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 skin/hair conditions. my suggestion is for you to see a good dermatologist and get it diagnosed and treated by an expert.