The top five causes of eyebrow dandruff, include three types of eczema (seborrheic dermatitis, contact dermatitis, and atopic dermatitis): The most common cause of eyebrow dandruff is seborrheic ...

Skin conditions: Eczema, psoriasis ... Pregnancy and childbirth: If there is a sudden change in your eyebrows and you are pregnant or just had a baby, this could be the reason this may be happening.