Scalp off white pieces of scalp is considered to be scalp off lumpy white flakes, there may be physiological reasons, there may be pathologic, by the scalp type psoriasis, seborrheic dermatitis, ringworm and other reasons. 1. Physiological reasons: mainly caused by the aging and shedding of scalp cells, there will be dry small pieces of dandruff on the scalp, the amount of dandruff is relatively small compared to the pathological, choose the appropriate shampoo to clean the scalp can have some relief. 2. Scalp-type psoriasis: the scalp can be seen clearly bordered red, light red plaques, often distributed along the hairline, the scalp is scattered in lumpy scales, the amount of dandruff is large, due to the thick layer of scales tightening, the hair can be bundled up as if hairbrush, but generally does not cause hair loss. 3. seborrheic dermatitis: the etiology is not clear, may be and Malassezia bacteria lead to skin barrier function is impaired, immune response, etc., which scaly seborrheic, overflowing dermatitis will cause the skin small pieces of furfuraceous dandruff can also cause the hair to fall out of the white block. 4. ringworm: fungal infection caused by scalp lesions (especially Malassezia), may also cause excessive dandruff, which leads to scalp white pieces. There may be other reasons (such as scalp eczema), it is recommended to go to the hospital in time to check, clear cause of the disease on the doctor’s prescription treatment.