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Folliculitis is one of the most frequent causes. It occurs when hair follicles become inflamed, usually due to shaving, waxing, tight clothing, sweating, or bacterial irritation. The bumps often look like small red or white pimples and may feel itchy or tender. Some contain pus, which can make them resemble acne. In most cases, folliculitis improves on its own with gentle hygiene, loose clothing, and avoiding further irritation. Warm compresses can help soothe discomfort. If the area becomes increasingly painful, swollen, or doesn’t improve, a healthcare provider may recommend treatment.