This domain includes recognizing health needs, obtaining care, managing treatment or medication, and prevention. These requirements expose the limits of a purely individual model. A person can be highly capable and still lack healthcare access. Another person may have limited personal capacity but function well because caregivers and clinical systems coordinate treatment effectively.

A scientific page on health should therefore distinguish health status from health-management capacity, and both from healthcare provision. It should also examine what happens when the person, family and institution disagree about who is responsible for noticing, deciding, arranging or paying for care.

Health-literacy research provides a mature external science for this domain. It operationalizes the ability to access, understand, appraise and apply health information, and recent systematic reviews show that these skills interact with social determinants and healthcare use. Administrative-burden research adds the system side: patients face learning, compliance and psychological costs when accessing care.