What condition can cause flaking and scaling of the scalp?

Pityriasis is a condition characterized by flaking and scaling of the scalp, commonly known as dandruff. This condition is linked to the rapid turnover of skin cells on the scalp, which leads to excessive shedding that appears as flakes. The presence of yeast organisms on the scalp can also contribute to this condition, exacerbating its symptoms. Individuals with pityriasis may experience itchiness, along with the visible flakes, which can lead to discomfort and social embarrassment.

Other conditions listed can cause various issues but are distinct from pityriasis. Alopecia primarily refers to hair loss and does not typically involve flaking or scaling. Tinea is a fungal infection that can affect the scalp (commonly known as ringworm), but it usually presents with symptoms such as redness and bald patches rather than simple scaling. Seborrhea involves excessive oil production, leading to oily, flaky skin but may not specifically present with the same characteristics as pityriasis. Therefore, the hallmark of flaking and scaling of the scalp aligns accurately with pityriasis.