Scalp irritation is sometimes caused by an imbalance in pH levels, which can lead to dryness, flaking, and discomfort. The ideal scalp pH is around 5.5, but hair products, water quality, and diet can throw this off.
Apple cider vinegar can help reset the balance, but it must be diluted to avoid irritation:
Don’t worry about the smell—it fades once your hair dries.

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