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If you're having trouble reaching nih.gov even though it appears to be up, try these steps:

Browser Fixes

• Press Ctrl+Shift+R (or Cmd+Shift+R on Mac) to force a full refresh
• Clear your browser cache and cookies for this site
• Try opening the site in an incognito/private window
• Try a different browser (Chrome, Firefox, Safari, Edge)

DNS & Network Fixes

• Flush your DNS cache — on Windows: ipconfig /flushdns
• Try switching to a public DNS: 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google)
• Check if the site works on your mobile data — if it does, the problem is your ISP or router
• Restart your router/modem

Still Not Working?

• The site may be blocking your IP address or country
• Your ISP might be having routing issues to this specific server
• Try accessing the site using a VPN or proxy service

The National Institutes of Health (NIH) is the primary U.S. federal agency for biomedical and public health research, offering health information and research resources.

The National Institutes of Health (NIH) website serves as the digital hub for America's medical research agency, part of the U.S. Department of Health and Human Services. The site provides comprehensive health information for patients, families, and the general public, including disease information, treatment options, and clinical trial databases. Healthcare professionals, researchers, and scientists use the platform to access research publications, grant opportunities, funding information, and scientific resources. The NIH website hosts multiple specialized databases and tools, including PubMed for medical literature, ClinicalTrials.gov for ongoing studies, and various health topic portals. Educational institutions rely on the site for authoritative medical and health science information. The platform also serves as a gateway to the 27 different NIH institutes and centers, each focusing on specific diseases, body systems, or research areas. Government officials, policymakers, and journalists frequently reference the site for official health data, research findings, and public health recommendations.

Common issues with nih.gov

Users commonly report slow loading times during high-traffic periods, particularly when major health news breaks or during public health emergencies. The site's extensive database searches can timeout during peak usage. Some users experience navigation difficulties due to the vast amount of content and multiple sub-sites within the NIH domain. Mobile users occasionally encounter formatting issues with older research documents and PDFs. Database maintenance windows can temporarily affect access to research tools like PubMed. General troubleshooting includes clearing browser cache, trying different browsers, and checking for scheduled maintenance announcements on the NIH status pages.

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