A woman was taken to hospital after tripping over a wasp nest, fracturing her ankle and going into anaphylactic shock due to the stings.

The woman, aged in her 20s, was walking on a track at Bethells Beach near Auckland when she stumbled on the nest yesterday about 1pm, the Westpac Rescue Helicopter crew said.

A spokesman said the medical report wasn't clear whether the stings were from bees or wasps, but wasps seemed more likely.

The woman was walking with others who raised the alarm.

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She was winched out of the location and taken by helicopter to North Shore Hospital.