Eryngo is an herb. The parts of the plant that grow above the ground and the root are used to make medicine.
 
People take eryngo for menstrual cramps (dysmenorrhea), infections of the kidney, bladder, or urethra (urinary tract infections or UTIs), swelling (inflammation) of the main airways in the lung (bronchitis), and other conditions, but there is no good scientific evidence to support these uses.