Three areas in particular, Provence-Alpes-Côte d'Azur, the Grand Est and Pays de la Loire have seen levels of illness above recognised epidemic numbers.
The Sentinelles de l'Inserm website, which records levels of different transferable illnesses, has said that 228 cases per 100,000 inhabitants have been recorded in Provence-Alpes-Côte d'Azur, 207 per 100,000 in Hauts-de-France and 205 per 100,000 in Pays de la Loire.
The threshold for an epidemic is 170 per 100,000, and currently across the whole of France the gastroenteritis figure stands at 146 per 100,000 people.
Sentinelles de l'Inserm say that it expects the number of people to suffer from 'la gastro' to increase over the coming weeks and to make sure they take precautions to stay clear of the bug.
Doctors say that people should regularly wash their hands especially before eating or after going to the toilet, and ensure toilet facilities are kept clean.
If you do go down with gastroenteritis, the illness can last up to three days, you will likely experience vomiting and diarrhoea, with health experts advising you to drink at least two litres of water a day.