As of 2015, the cause of seborrhea is unknown, according to the American Academy of Family Physicians, or AAFP. Suspected causes include a yeast-like organism, stress and hormones.
The primary symptom of seborrhea is an itchy, red and scaly rash, states the AAFP. Seborrhea is known as dandruff when it affects the scalp, but it can also affect the face and other parts of the body.
Adult men are at higher risk of developing seborrhea, although women can also develop the condition. Having oily skin, AIDS or Parkinson's disease also increases a person's risk of developing seborrhea, according to the AAFP.
Dandruff shampoos such as Selsun Blue, Head & Shoulders or Zincon can be used to treat seborrhea of the scalp. Seborrhea of the face and other body parts can be treated by bathing daily with soap and water. Seborrhea is known as cradle cap when it occurs in infants. It can be treated with gentle brushing and frequent shampooing.
Exercise, rest and exposure to sunlight can also help relieve the condition, according to the AAFP. For most people seborrhea is incurable. In some cases, a doctor can prescribe anti-fungal medications and other prescription treatments to relieve seborrhea symptoms. In babies, the condition usually disappears in a few months.