• Cradle cap in infants is a form of seborrhoeic dermatitis.  Treatment is often unnecessary but suggested management options include the use of baby oil, baby shampoo, or vegetable oils, such as olive oil.

• The cause of seborrhoeic dermatitis is unknown but Malassezia yeasts, in particular Malassezia furfur have been implicated.

• Malassezia yeasts thrive in oily environments, especially vegetable oils.  It has been suggested that olive oil can encourage the proliferation of Malassezia furfur and worsen the condition.

• No evidence has been found that the use of olive oil for cradle cap leads to a worsening of the condition in clinical practice, and there seems no reason to change current recommendations.  If the condition is not improving however, it may be preferable to use an alternative baby oil based on mineral oils.