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Fig. 4.2 This healing ulcer is surrounded by an area of shiny new pink and white epithelium.

discharge. A purplish colour indicates reduced oxygen supply to the tissues: this may result from ischaemia or severe infection or both.

Healing ulcers are surrounded by an area of shiny new pink and white epithelium (Fig. 4.2).

Discharge

Purulent discharge is indicative of infection. Clear or yellow-tinged viscous bubbly discharge from an ulcer which probes to bone may be synovial fluid indicating involvement of the joint. Increased amounts of clear discharge may be an early indication of infection.

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