Pig’s ear herb, also known as plantain, is mainly used for diuretic, clearing heat, brightening eyes and expectorant. It can be used in clinical practice to treat a number of related diseases, the more common ones being mumps, bacterial dysentery, chronic bronchitis, acute glomerulonephritis, pediatric enuresis, pyelonephritis, renal colic, kidney stones and hydronephrosis, all of which can be effectively treated. For common gout, prostatitis, glaucoma and mouth ulcers, it can also be applied appropriately to assist in treatment. Clinically, plantain is very effective for some coughs and coughs, and is especially suitable for treating some respiratory diseases because its expectorant and cough-suppressing effects are very good.