Are there other symptoms present?
Seborrheic dermatitis is a common, inflammatory skin condition that causes flaky, white to yellowish scales with or without reddened skin. It can be due to a combination of an over production of skin oil and irritation from a yeast (malessizia). Stress, fatigue, weather extremes, oily skin, and even obesity may also increase the risk. Check also with your doctor for direct clinical examination. Take care and do keep us posted.