Self-heal is also known as Prunella vulgaris, and it’s one of Dr. Fratellone’s favorite herbs. “Also called All Heal, this herb is great for congestion, and it reduces swelling in the lymph glands,” he says. “It has an antibiotic effect against a wide range of bacteria and viruses,” he says. Self-heal can also be used to treat sore throats. Try using it to create a tea and drinking it two or three times a day when you’re feeling under the weather.