Lemongrass is pungent and warm in nature, which itself has the effect of dispelling wind and dampness, reducing swelling and relieving pain, and can be used to treat all rheumatic diseases. If rheumatism is on the head and face, the patient often shows headache, heavy head, and head swelling. If the evil of wind-dampness is in the stomach and intestines, patients often show loss of appetite, nausea and vomiting, or even salivation at the mouth, sticky and unpleasant stools, and some patients show loose stools. If the evil of wind and dampness is in the joints, patients often show swelling and pain in the joints, while some patients show swelling and pain in the joints that are not too heavy. If the evil of rheumatism is in the lower limbs, it often manifests as edema of the lower limbs. In addition, lemongrass can also be used to treat bruises and injuries, such as localized redness, swelling and heat pain caused by trauma, and for women, it can also treat menstrual disorders, which are caused by dampness blocking the lower jiao. Citronella contains an important ingredient, lemongrass oil, which itself has a certain role in improving the body’s microcirculation, improving blood supply to the heart and regulating blood pressure. Citronella root also contains insulin-like effects, which itself has a certain hypoglycemic effect on diabetic patients.