Witch hazel is well-known for its astringent properties, which help tighten and tone the skin. It can constrict the skin's tissues, reduce the appearance of pores, and provide a temporary firming effect. It also contains compounds called tannins that have anti-inflammatory properties. These tannins can help reduce redness, swelling, and irritation, making witch hazel suitable for calming sensitive or inflamed skin conditions such as acne, eczema, or sunburn.