Redness or scales on your scalp may be an indication of skin irritation or other medical condition. Skin conditions that may cause red blotches include psoriasis, dermatitis and ringworm, according to MayoClinic.com. These conditions can affect any part of the body, including your scalp. For more information on your specific medical condition, be sure to speak to a doctor or licensed dermatologist.
Dermatitis
Dermatitis is a skin condition that can cause red blotches, scales or rash on your skin. According to MayoClinic.com, dermatitis symptoms can be experienced on most parts of your body, including your hands, feet, limbs and scalp. As the website suggests, there are many different types of dermatitis including seborrheic dermatitis and atopic dermatitis, or eczema.
Psoriasis
According to MayoClinic.com, psoriasis is another skin condition that can cause redness or blotches on most parts of your body, including your scalp. In extreme cases, psoriasis on your scalp can also cause hair loss in patches, leading to erratic baldness. Psoriasis is a persistent, chronic disease that can worsen in severity when left untreated. While merely a nuisance for most patients, psoriasis can also be rather painful when severe in nature.
Ringworm
Ringworm is an extremely contagious skin condition that can also leave red scales or blotches on your body. While most commonly seen on the limbs or torso, ringworm rashes can also be found on the scalp in some patients. This rash is typically circular in shape and slightly raised from the skin and can differ in size. According to MayoClinic.com, ringworm of the scalp is also known as tinea capitis.
Treatment
In most cases of skin rash or irritation, your doctor will typically recommend or prescribe a topical skin ointment or lotion to be applied directly to the affect area. In the case of extreme rashes or skin conditions, your doctor may also prescribe an oral medication that may contain a steroid to help reduce swelling or inflammation, according to the Cleveland Clinic.
Prevention/Solution
Prevention of skin rashes caused by dermatitis, psoriasis or other conditions includes adequate washing of the skin during normal bathing or showering. According to the Cleveland Clinic, dermatitis can be prevented by washing your skin that may come in contact with known allergens or skin irritants, such as poison ivy or poison oak. Keeping your scalp hydrated via the use of moisturizing shampoo may also assist in the prevention of skin irritation.


