Overview

Scurvy is a nutritional disease that results from an insufficient supply of vitamin C (ascorbic acid). Humans, unlike many animals, cannot make vitamin C internally and must obtain it from the diet. When intake is inadequate for an extended period, the body’s connective tissues and many metabolic processes are affected, producing a recognizable clinical picture.

Causes and biological basis

The primary cause of scurvy is prolonged deficiency of dietary vitamin C, usually because of limited access to fresh fruits and vegetables. Vitamin C is required for the formation and maintenance of collagen, a structural protein in skin, blood vessels, bones and gums. Without enough vitamin C, collagen synthesis is defective, which weakens blood vessel walls, impairs wound healing, and leads to bleeding and tissue breakdown.

Signs and symptoms

Early complaints are often non-specific—fatigue, malaise and irritability—but as the deficiency progresses characteristic findings appear. Common clinical signs include:

  • Small red or purple spots on the skin (petechiae) and bruising; see skin signs.
  • Swollen, bleeding gums and loosening of teeth; bleeding from mucous membranes is typical and may include the mouth or nose (gums and mucosa).
  • Joint and muscle pain, aching and reduced mobility due to weakening connective tissue and small internal hemorrhages (joint symptoms).
  • Poor wound healing, anemia, and sometimes mood changes such as low mood or apathy.

Diagnosis, treatment, and prevention

Diagnosis is clinical, supported when dietary history and physical findings point to deficiency; blood tests can measure vitamin C levels. Treatment is straightforward: replacement of vitamin C through dietary improvement and supplements leads to rapid clinical recovery in most cases. Fresh citrus fruits and other fruits and vegetables are efficient sources; for practical guidance see resources on fruit sources and general advice about fresh vegetables. In established disease, short courses of oral vitamin C and attention to nutrition usually resolve symptoms.

History and historical importance

Scurvy is historically famous for affecting sailors and explorers who spent long voyages without fresh produce. Before preservation and provisioning methods improved, long sea voyages commonly produced outbreaks of scurvy among crews; this association with seafaring communities is well documented and remains a notable episode in medical and naval history. For background on maritime outbreaks, see accounts related to sailors and voyages.

Modern occurrence and notable facts

In modern, well-nourished populations scurvy is uncommon, but it still appears in vulnerable groups: people with severe malnutrition, restrictive diets, alcohol dependence, psychiatric illness, or limited access to fresh foods. Public health measures, dietary education and food availability have made scurvy rare, yet clinicians remain alert for its signs because it is fully preventable and rapidly treatable. For further reading and clinical summaries consult general medical resources and nutrition guides (clinical summaries, nutritional references, disease overviews).