As a medicinal herb, lemongrass has the effects of dispelling wind and clearing collaterals, warming the middle and relieving pain (relieving pain by warming the spleen and stomach), and inducing dampness and stopping diarrhea. There are no authoritative studies on the side effects and contraindications of lemongrass. Lemongrass is the dried above-ground part of the grass plant lemongrass, taste pungent, sweet, warm, belongs to the lung, stomach, spleen meridian, has the efficacy of dispelling wind and clearing collaterals, warming the middle and relieving pain, and inducing dampness and stopping diarrhea. In case of external wind-cold headache, head wind headache, rheumatism paralysis, cold pain in the epigastric region (stomach and abdomen feel cold and painful), diarrhea, edema, foot fungus, bruises and other illnesses, it can be treated or improved by taking lemongrass. At present, no authoritative studies have been found to point out the side effects and contraindications of lemongrass. However, as a traditional Chinese medicine, lemongrass should be used under the guidance of a professional doctor’s diagnosis, and should not be purchased and used by oneself to avoid damage to the organism caused by improper use of medication.