Yarrow can be used diluted (moisten area with water first, apply, then rinse with a little water again) it can be sprayed onto cuts and scrapes to disinfect. Apply directly to reduce swelling and speed healing of bruises or calm itchy insect bites. It helps move respiratory congestion. It can be taken internally (diluted in water) or applied directly to the chest or throat area. As a bitter herb, it is helpful for digestion taken diluted in water, to prevent or relieve an upset belly.
 
Do not take yarrow internally if you are pregnant or taking blood pressure medications.