Witch hazel is taken by mouth for diarrhea, mucus colitis, vomiting blood, coughing up blood, tuberculosis, colds, fevers, tumors, and cancer.
Some people apply witch hazel directly to the skin for itching, pain and swelling (inflammation), eye inflammation, skin injury, mucous membrane inflammation, vaginal dryness after menopause, varicose veins, hemorrhoids, bruises, insect bites, minor burns, acne, sensitive scalp, and other skin irritations.
In manufacturing, witch hazel leaf extract, bark extract, and witch hazel water are used as astringents to tighten the skin. They are also included in some medications to give those products the ability to slow down or stop bleeding. Those medications are used for treating insect bites, stings, teething, hemorrhoids, itching, irritations, and minor pain.