Avoid scratching to prevent further skin irritation.
Pityriasis usually clears up on its own within a few weeks.
Fungal infections: when redness persists.
Fungal infections, such as tinea capitis (ringworm of the scalp), cause itching accompanied by redness, scaling, and sometimes localized hair loss.
What to do?
See a dermatologist for an accurate diagnosis.
Follow a course of oral antifungal medication and use specific shampoos.
Continue treatment even if symptoms improve to prevent recurrence.
Reactions to chemicals: be careful with hair dyes.
Hair coloring can cause allergic reactions: itching, redness, burning, or even blisters. A common culprit is paraphenylenediamine (PPD), a frequent ingredient in hair dyes.
