Regular shampooing helps remove excess oil, sweat, dead skin cells, and buildup from styling products or pollution. When these accumulate, they can lead to itching, irritation, unpleasant odors, or hair that feels heavy and dull. A common myth is that frequent washing causes the scalp to produce more oil. Experts explain that oil production is largely driven by genetics and hormones, not by how often you shampoo. In fact, going too long between washes can sometimes worsen scalp issues, leading to flaking, discomfort, or limp-looking hair—particularly for people who exercise frequently, wear hats, or live in warm or humid environments.
