Nursing is a regulated healthcare profession concerned with promoting health, preventing illness, assessing health needs, providing direct care, supporting recovery, managing symptoms, administering and monitoring treatments, educating patients and families, and helping people live with illness, disability or end-of-life conditions. Nurses work across hospitals, General Practice, community services, care homes, mental health services, maternity services, schools, public health, research, education and many specialist clinical environments. Nursing is not simply assistance to doctors: registered nurses have their own professional responsibilities, assessment skills, clinical judgements, standards of practice and accountability. Scope of practice varies according to jurisdiction, registration category, education, experience and specialist training.
Nursing has a long history of organised caregiving, but modern professional nursing developed substantially during the nineteenth century. Florence Nightingale is historically associated with reforms in nursing education, sanitation, hospital organisation and the systematic use of mortality data during and after the Crimean War, although nursing history encompasses many contributors and traditions beyond Nightingale. During the twentieth century, nursing education became increasingly formalised, regulation expanded and specialist nursing roles developed. Contemporary nursing includes evidence-based practice, advanced clinical roles, prescribing in some jurisdictions, research, leadership, informatics and public-health functions. The profession has therefore evolved from primarily bedside caregiving into a diverse body of clinical, educational, managerial, research and policy practice.
Nursing practice begins with assessment of the person's physical, psychological, social and sometimes spiritual needs, followed by planning, implementation and evaluation of care. Nurses monitor vital signs, symptoms, fluid balance, consciousness, wounds, mobility, nutrition and other clinical variables according to the patient's condition. They identify deterioration and escalate concerns through established clinical pathways. Nurses also provide continuous observation that can reveal subtle changes between formal medical reviews. Clinical nursing requires interpretation rather than merely recording observations: a change in respiratory rate, mental state, urine output or pain can have different significance depending on the patient's underlying condition and treatment.
Medication management is an important area of Nursing, although exact responsibilities depend on jurisdiction and role. Nurses may administer prescribed medicines, assess effects, monitor adverse reactions, support adherence, educate patients and identify discrepancies or contraindications. They may also participate in medication reconciliation during admission and discharge. In some jurisdictions and advanced roles, appropriately qualified nurses can prescribe specified medicines within legal and professional frameworks. Nursing responsibilities extend beyond medicines to wound care, infection prevention, catheter care, oxygen therapy, nutrition support, continence care, pressure-injury prevention and numerous other interventions. Safe practice requires accurate identification, appropriate documentation, knowledge of indications and contraindications, and recognition of when a treatment requires escalation.
Nursing has a strong relational and educational component. Nurses often spend substantial time with patients and families, explaining procedures, reinforcing treatment information, assessing concerns and supporting participation in care decisions. Communication must be adapted to age, language, health literacy, cognitive ability and cultural context. Patient advocacy is another important professional concept: nurses can raise concerns about safety, communicate patient preferences and support appropriate involvement in decisions. Advocacy does not mean making decisions on behalf of patients; rather, it involves helping ensure that relevant information, preferences, rights and safety concerns are recognised within care processes.
Nursing includes many specialist fields, including adult, children's, mental health and learning-disability nursing in the United Kingdom, together with numerous specialist and advanced-practice roles. Nurses may specialise in critical care, emergency care, oncology, renal services, infection prevention, diabetes, respiratory care, community nursing, practice nursing, public health, perioperative care and many other areas. Advanced nursing roles can involve extended assessment, diagnosis, prescribing, independent clinics and specialist procedures where the practitioner has the necessary education, competence and legal authority. The existence of specialist roles means that "a nurse" does not describe a single uniform set of activities; professional responsibilities depend heavily on setting and level of practice.
Advantages of nursing include continuous patient contact, broad applicability across healthcare settings, strong contribution to monitoring and prevention, and integration of technical and interpersonal care. Challenges include high workload, staffing pressures, emotional demands, exposure to infection and injury risks, shift work and the complexity of caring for patients with multiple needs. Nursing quality is influenced by staffing, education, leadership, workplace conditions, resources, teamwork and organisational culture rather than by individual clinical skill alone. Nursing is also distinct from medicine: physicians generally receive extensive training in medical diagnosis and medical treatment, while nursing education centres on nursing assessment, care, health promotion, clinical management and the person's response to illness and treatment, with substantial overlap in some advanced roles.
Nursing is central to almost every part of a modern healthcare system. Nurses contribute before illness through health education and prevention, during acute illness through assessment and treatment, during recovery through rehabilitation support and after discharge through community follow-up and chronic disease management. They work closely with General Practice, Emergency Medicine, Hospital Medicine, Midwifery, Pharmacy, Physiotherapy, Occupational Therapy and other professions. Professional nursing terminology and registration systems differ internationally, so titles such as registered nurse, licensed nurse, practical nurse and advanced practice nurse should not automatically be treated as equivalent. The core discipline nevertheless consistently combines clinical knowledge, assessment, direct care, safety monitoring, communication, education and professional accountability.
