Black tea contains quercetin, which is thought to have antiviral properties, as well as tannin, which is believed to help prevent nosebleeds. Drink one to two cups of strongly brewed black tea if you have suffered from an outbreak of cold sores or are experiencing frequent nosebleeds. A wet tea bag can also be used as a poultice directly on the nose to help stop the bleeding, or on an insect bite to reduce swelling.

Yarrow contains an alkaloid that helps blood clot more quickly and also has antibacterial properties. Gently crush fresh leaves and flowers to release the essential oils, and use as a poultice directly on the cut. You can also steep the leaves and flowers to make a tea, then use the tea as a wash for the cut. Use powdered, dried Yarrow leaves on cuts to stop bleeding and to disinfect wounds and place a pinch in the nose to stop a nosebleed. Note: Do not use yarrow if you're pregnant; it contains a substance that is believed to be a potential trigger for uterine contractions.