A dry scalp is caused primarily by a lack of moisture in the skin on the scalp, leading to irritation, tightness, and flaking. Common causes include over-washing hair which strips natural oils, cold or dry weather, certain skin conditions like eczema or psoriasis, lifestyle factors such as poor diet or smoking, use of harsh hair products, hormonal changes, and aging which naturally dries the skin. Other contributors can be dehydration from not drinking enough water and environmental pollutants. When the scalp loses its natural moisture, its protective layer weakens, making it prone to irritation and microinflammations leading to dryness and itchiness. If dry scalp is accompanied by symptoms like sudden hair loss or severe irritation, consulting a dermatologist is advisable.
