Disease encyclopedia/Eyes, ears, nose & throat
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    Eyes, ears, nose & throatInfection/allergicICD-10 H10

    Conjunctivitis (pink eye)

    Also called: Pink eye

    Inflammation of the thin membrane covering the white of the eye, causing redness, grittiness and discharge. Usually viral or allergic and self-limiting.

    Condition-specific references are below. Individual claims and this page have not been clinically reviewed. Read about this content.

    Affected: Eye (conjunctiva)

    Causes

    • Viruses (adenovirus)
    • Bacteria
    • Allergies (hay fever)

    Risk factors

    • Contact with infected people
    • Allergies
    • Contact lens use

    Symptoms

    • Red, gritty eyes
    • Watery or sticky discharge
    • Itching (allergic)
    • Crusting on waking

    Diagnosis — tests and examinations

    • Clinical

    Treatment

    Medicines and medical treatment

    • Antibiotic drops for significant bacterial conjunctivitis
    • Antihistamine drops for allergic conjunctivitis

    Self-care, home remedies and lifestyle

    • Clean eyelids with cooled boiled water
    • Wash hands, don't share towels
    • Remove contact lenses until resolved

    Possible complications

    • Keratitis (rare)

    Prevention

    • Hand hygiene

    Outlook

    Resolves in 1–2 weeks.

    When to see a doctor

    See a doctor urgently for eye pain, light sensitivity, reduced vision or if you wear contact lenses.

    Sources and further reading

    These sources cover this condition. They have not been checked against every statement on this page.

    • Conjunctivitis — NHS

    Related conditions

    CataractGlaucomaAge-related macular degenerationDiabetic retinopathyMiddle ear infection (otitis media)Age-related hearing loss (presbycusis)

    Educational overview, not medical advice. Treatment varies by person and location. Consult a qualified health professional for diagnosis or care. Read our content and model notes and privacy information.

    Affected: Eye (conjunctiva)

    See it in 3-D

    Eyes

    Anatomy

    • Eyes

    On this page

    • Causes
    • Risk factors
    • Symptoms
    • Diagnosis — tests and examinations
    • Treatment
    • Complications
    • Prevention
    • Outlook
    • When to see a doctor
    • Sources