Xia Ku Cao can treat eye pain caused by inflammation of liver fire. However, not all patients with eye pain are suitable for taking Xia Ku Cao, and the drug should be used according to the patient’s specific condition and under the guidance of a professional doctor. Xia Gu Cao is a kind of traditional Chinese medicine with pungent and bitter flavor, cold in nature, and belongs to the liver and gallbladder meridians. Its effects are clearing the liver and diarrhea (removing liver fire), brightening the eyes, dispersing knots and subduing swelling. It is used to treat red, swollen and painful eyes, headache and dizziness caused by inflammation of liver fire, night pain in the eyeballs caused by deficiency of liver yin, scrofula (equivalent to lymphatic tuberculosis in the neck), gall tumors (equivalent to tumors in the thyroid gland), and swollen and painful carbuncles (equivalent to mastitis). It can be seen that Xia Gu Cao can treat eye pain, but it is only suitable for treating red, swollen and painful eyes caused by liver fire and nocturnal eye pain caused by liver yin insufficiency, and should not be used by people with eye pain caused by other reasons. The drug is cold in nature, so it should be used with caution by people with deficiency of spleen and stomach (spleen and stomach weak and cold). Chinese medicines should be used after identification by a professional Chinese medicine practitioner, and should not be used blindly on one’s own to avoid causing adverse reactions or aggravating the condition.