Treatment
Although scalp eczema cannot be cured, medical treatment can bring relief by removing the scaly buildup and reducing itchiness.
Treatments for scalp eczema usually come in the form of a shampoo or a cream or gel to apply to the scalp.
Shampoos that are most effective against scalp eczema include those that contain one or more of the following ingredients:

zinc pyrithione
salicylic acid
selenium sulfide
ketoconazole
coal tar
In mild cases of scalp eczema, antifungal creams, ointments, or sprays can be effective. Typically, these contain coal tar or corticosteroids that help calm the irritation and stop the flaking.

In more severe cases, a mild corticosteroid can calm the inflammation. Doctors may prescribe topical corticosteroids to treat an active flare-up marked by redness, itching, and flaking. Corticosteroids are not suitable for use over long periods.

Doctors may also prescribe non-corticosteroid medicine, such as topical drugs that suppress the immune system called calcineurin inhibitors. People can use these for a more extended period than corticosteroids.

In very severe cases, a doctor may prescribe an oral antifungal medication.

Natural Remedies
Anecdotally, natural remedies have helped relieve the symptoms of scalp eczema in some people. These include the following topical treatments:

tea tree oil
olive oil
aloe vera
The following dietary supplements have been beneficial in some cases:

vitamins A, D, B
zinc
probiotics
omega-3
water


Prevention
Flare-ups can be prevented by reducing stress and by avoiding exposure to suspected irritants. Irritants affect people differently, but they can include hair dye, harsh soap, and very hot water.

It can help to keep the scalp clean with a gentle shampoo and warm water. It is a good idea to do this after heavy work or exercise, as sweat can be a trigger in some cases.