MeSH (Medical Subject Headings) is the National Library of Medicine's (NLM) controlled vocabulary. NLM is the producer of MEDLINE, which is the primary component of PubMed. MeSH terms are assigned to articles based on content. When searching PubMed, we encourage you to use MeSH, as these terms will help you target your search.
In PubMed, select MeSH from the search bar's drop-down menu, or select the MeSH Database link under More Resources to discover MeSH term(s).