PubMed comprises more than 25 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
For a basic keyword search, type the word(s) into the search box, and click Search. PubMed will suggest phrases that complete your entry or that are related to the words you're entering.
Use the filters on the left sidebar to narrow down your results by specifying different categoriessuch as language, type of article, age, gender, etc
if you have a PMID (PubMed ID) or PMCID (PubMed Central ID) just enter that number in the PubMed search box.
Look for the icon or another full text icon in the top right of the abstract page, and click the icon to access the full article text.