Eczema Causing Hair Loss. At the advice of a physician. Seborrheic dermatitis primarily affects the scalp, but it also can develop on other parts of the body.
And contact dermatitis (one common allergen is paraphenylenediamine, or ppd, a chemical in black hair dye). Frequent scratching can also cause bleeding and damage your hair follicles. If left untreated, seborrheic eczema can lead to hair loss.