Oily Dandruff is a type of seborrhoeic dermatitis characterised by the accumulation of yellowish or white flakes on the scalp, which are often accompanied by oiliness and can cause itching and irritation.
This type of dandruff is common in people with oily skin and is related to the activity of a fungus called Malssezia, which lives naturally on the skin, but can proliferate excessively under certain conditions:
Excess sebum production (oily scalp)
Stress
Hormonal factors
Inadequate hair products