A man has been flown to hospital after he was stung by insects near Rotorua.

The Rotorua-based BayTrust Rescue Helicopter was called to Lake Rotoehu, 30km North East of Rotorua, on Saturday afternoon.

The Rotorua-based BayTrust Rescue Helicopter at the scene. Photo: supplied.

A rescue helicopter pilot says the 44-year-old Hamilton man appeared to be suffering from a reaction from the insects.

He was treated at the scene and airlifted to Rotorua Hospital in a comfortable condition for further assessment.

The helicopter was deployed as the site was isolated.

Lake Rotoehu is the smallest in a chain of three lakes to the northeast of Lake Rotorua in New Zealand's North Island. It is located between the city of Rotorua and town of Whakatane.