The dried flowers are used to make medicine, tinctures, botanicals... Cornflower tea is used to treat fever, constipation, water retention, and chest congestion. Also used as a tonic, bitter, and liver and gallbladder stimulant. Women take it for menstrual disorders and vaginal yeast infections. Apply cornflower directly to the eye for irritation or discomfort. In foods, cornflower is used in herbal teas to provide color.