It may be that you simply have something called seborrheic dermatitis. This is an inflammatory condition of oil-rich areas of the skin like the scalp, hairline, eyebrows, and facial creases. It often results in thickened skin that can be reddened and itchy and can lead to scaling areas that look like scabs. Although all the causes of seborrheic dermatitis are not known, it may be related in part to fungus living on the surface of the skin.
The best first step in treating seborrheic dermatitis is good skin and hair hygiene. An anti-dandruff shampoo containing selenium sulfide or similar agent (there are many available at your pharmacy) is a good first approach, as this will reduce inflammation and soften and loosen the scaling areas. Avoid picking at the areas, as this could lead to worsening inflammation or infection.
If this does not work, see your doctor
who can confirm the diagnosis and may prescribe other medications, including antifungal or steroid creams.
If it is not seborrheic dermatitis, it may be folliculitis, or infections of the hair shafts by bacteria. This can also be confirmed by your doctor on physical examination and can usually be treated with topical antibacterial medications.