A dry spot on the scalp usually indicates the presence of a condition referred to as seborrheic dermatitis. The dry spots on the scalp may be white to yellowish in color and often cause itching and flakiness. Seborrheic dermatitis is a common skin condition that does not cause any complications, according to the Mayo Clinic website.
Symptoms
In addition to dry spots on the scalp, seborrheic dermatitis is characterized by the presence of greasy, oily areas on the scalp, skin scales, itchiness and skin lesions, according to the Mayo Clinic website. Seborrheic dermatitis may also result in hair loss if the condition causes damage to the hair follicle.
Causes
The exact cause of seborrheic dermatitis is unknown, but a number of factors are thought to play a role in the development of the dry spots on the scalp. A fungus, called malassezia, that normally grows in the oily secretions of the skin contributes to the development of seborrheic dermatitis, according to the Mayo Clinic website. Increased stress, fatigue and changes in weather may also contribute to the development of seborrheic dermatitis. People with neurological conditions and HIV/AIDS are also more prone to seborrheic dermatitis.
Treatment
You can treat seborrheic with over-the-counter medicated shampoos, which should be used every day until the dry spots on the scalp go away. Once the spots are gone, continue using the shampoos approximately two to three times per week, according to the Mayo Clinic. If over-the-counter shampoos are not effective in treating the condition, a doctor can prescribe stronger medicated shampoos. The American Academy of Family Physicians notes that prescription steroid lotions may also be an option for treating seborrheic dermatitis.
Prognosis
Although treatment may control the symptoms of seborrheic dermatitis, Medline Plus notes that it is a chronic condition. Seborrheic dermatitis is often characterized by long periods of remission that alternate with periods of flare-ups.
Considerations
Seborrheic dermatitis is most common in babies younger than 3 months old and adults between ages 30 and 60, according to the American Academy of Family Physicians. When seborrheic dermatitis occurs in infants, it is often referred to as cradle cap. According to the Mayo Clinic website, cradle cap usually clears up on its own within three months.
