A solution of the extract may be applied to the skin to relieve joint pain and muscle aches. Astringent properties of nettle aerial parts may also help to lessen the swelling of hemorrhoids and stop bleeding from minor skin injuries such as razor nicks. An astringent shrinks and tightens the top layers of skin or mucous membranes, thereby reducing secretions, relieving irritation, and improving tissue firmness. It may also be used topically for dandruff and overly oily hair and scalp.