An itchy scalp is common, and the cause isn’t always dandruff. Common possibilities include:
- Dandruff/seborrheic dermatitis: Often causes itching with white or yellowish flakes and sometimes oily, irritated skin.
- Dry scalp: More likely when the skin feels tight or flaky, particularly in dry or cold weather.
- Contact dermatitis: Hair dye, shampoo, conditioner, oils, fragrances, or styling products can trigger irritation or an allergic reaction.
- Psoriasis: Can cause thick, well-defined patches with silvery scales, sometimes extending beyond the hairline.
- Eczema: May cause dry, itchy, inflamed skin.
- Fungal infection (tinea capitis): More common in children and can cause scaling, broken hairs, or patches of hair loss.
- Head lice: Usually produces intense itching, particularly around the ears and the back of the neck; you may see nits attached firmly to individual hairs.
- Other skin conditions: Less commonly, infections or inflammatory disorders can be responsible.
What you can do
Try avoiding newly introduced hair products and use a gentle shampoo. If dandruff is likely, an anti-dandruff shampoo containing ketoconazole, selenium sulfide, zinc pyrithione, or salicylic acid may help, depending on the product and local availability.
See a clinician or dermatologist if you have significant redness, sores, pus, bleeding, severe pain, spreading rash, or hair loss, or if the itching persists despite appropriate self-care.
If you tell me whether you have flakes, redness, bumps, or hair loss, I can help narrow down the most likely cause.
