Itching of the scalp with white particles is most likely due to seborrheic dermatitis, which causes flaking of the scalp. The occurrence of seborrheic dermatitis may cause a certain amount of metaplastic erythema of the scalp, which is actually an inflammatory manifestation. After this inflammatory manifestation, it may damage the scalp’s stratum corneum, and after the stratum corneum is damaged, it will gradually age, keratinize and peel off. This is also known as a white granule that is seen or felt, and some granules. If it continues to develop, flaky white scales may appear, which is the most distinctive feature of seborrheic dermatitis.