Aromatherapy refers to the method of using the aromatic components of plants in appropriate forms to act on the entire body or a specific area to prevent and treat diseases. Essential oils used in aromatherapy are hydrophobic liquids containing volatile aromatic molecules， such as limonene， linalool， linalool acetate， geraniol， and citronellol. These chemicals have been extensively studied and shown to have a variety of functions， including reducing anxiety， relieving depression， promoting sleep， and providing pain relief. Terpenoids are a class of organic molecules with relatively low lipid solubility. After being inhaled， they can pass through the nasal mucosa for transfer or penetrate the skin and enter the bloodstream upon local application. Some of these substances also have the ability to cross the blood-brain barrier， thereby exerting effects on the central nervous system. Currently， the academic community generally agrees that products such as essential oils and aromatherapy from aromatic plants have certain health benefits. However， the process of extracting a single component from it and successfully developing it into a drug still faces many challenges. Its safety and efficacy still need to be further verified through more rigorous and systematic experiments. This article systematically elaborated on the efficacy of aromatic substances， including plant extracts and natural small molecule compounds， in antibacterial and antiviral fields and the regulation of nervous system activity. As a result， a deeper understanding of aromatherapy was achieved. At the same time， the potential of these aromatic substances for drug development was thoroughly explored， providing important references and insights for possible future drug research and application.

AIM: To investigate Jianwei Yuyang Granule(Radix Bupleuri,Radix codonopsis,Radix paeoniae alba,Rhizoma corydalis,etc.) the effects of on curative effect and quality of life of Helicobacter pylori(Hp)-positive peptic ulcer(PU) patients. METHODS: 46 Hp-positive PU patients whose differentiation of symptoms and signs of the traditional Chinese medicine was the stagnation of liver-QI with deficiency of the spleen type were divided randomly into Jianwei Yuyang Granule group and western medicine control group(Metronidazole,amoxycillin and ondansetron).Eradicative rate of Hp、curative effect under gastroscope、clinical curative effect in Chinese medicine syndrome were observed and quality of life were evaluated by McMaster questionnaire. RESULTS: Compared with western medicine control group,Hp eradicative rates was lower(P0.05),Jianwei Yuyang Granule gained an advantage against western medicine with regard to effect on traditional Chinese medicine syndrome and quality of life(P