Volunteers at St John Ambulance gave first aid to 657 people at the V Festival in Chelmsford this weekend.
The number treated was down from 752 people last year. 28 people were taken to hospital.
Darren Bartholomew, from St John Ambulance, said: "As expected, with up to 85,000 festival goers at this event each day, we were called upon to deal with many different types of first aid incident, but after months of preparation we were ready to tackle everything which came our way.
"I'd personally like to thank all our volunteers who gave up their time to provide first class care and were on hand to make sure that everyone who came to us for treatment was able to receive it."
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