It is believed to be caused by sebum overproduction (sebaceous glands) often in combination with a yeast infection (Malassezia). It’sis not caused by poor hygiene or allergies. Cradle cap is a very common condition estimated to occur in approximately 50 percent of all infants.
Seborrhoeic dermatitis can occur on different body parts. On the eyebrows, eyelids, behind the ears, crease of the nose, back of the neck, nappy area or folds of the knee, armpits or inner elbow.