Health officials across the west country are asking people to stay away from hospitals if they have the norovirus.
Four wards remain closed at the Royal United Hospital in Bath following an outbreak of the winter vomiting bug.
There's also restricted access to some wards at Yeovil and Musgrove Park Hospital in Taunton.
Visitors are restricted at Bath's Royal United Hospital due to an outbreak of norovirus.
The highly infectious diarrhoea and vomiting bug usually lasts for 48 hours, and people who have had symptoms in that time are being asked to stay away from the hospital.
The affected wards are Pulteney Ward, Robin Smith Ward, William Budd Ward, Haygarth Ward and Forrester Brown Ward.
Gloucestershire Royal Hospital has closed several wards today following an outbreak of a diarrhoea and vomiting illness.
Director of Nursing Maggie Arnold said this was a precautionary measure to control the spread of infection, and that the hospital is hoping to reintroduce visiting in a few days. Maternity wards are still open to visitors, but children's wards are only for parents and carers. Relatives who wish to visit on compassionate grounds are asked to speak to ward staff before entering.
A hospital that was hit by the winter vomiting bug norovirus has re-opened all its wards in time for Christmas. At one point four wards were closed to new admissions at Weston General Hospital.
The trust has extended visiting times from 10am to 8pm between Christmas Day and Sunday 28 December. It is still warning visitors to remain vigilant and not to come if anyone has had a bug or cold or flu symptoms in the last two days.
Two wards at Gloucestershire's two main hospitals have been closed to prevent patients from contracting an airborne sickness bug.The Avening Ward at Cheltenham Hospital and Ward 4A at Gloucestershire Royal Hospital are subject to visiting restrictions due to the outbreak of Norovirus.
A spokeswoman for the Gloucestershire Hospitals NHS Trust said the illness is usually over within 48 hours but is highly infectious, which is why the Trust needs to limit the number of people moving in and out of the affected ward.
Staff at Weston General Hospital are dealing with an outbreak of norovirus, the winter vomiting bug.
Visiting times are being restricted. People are only allowed to stay for an hour a day at 6.30 pm, with only two visitors per bed.
The Trust says that anyone with sickness or diarrhoea should stay away from hospitals or GP surgeries as the illness is highly contagious.
Cheltenham General Hospital has been closed to visitors after an outbreak of norovirus. The hospital decided to close all wards to visitors as a precautionary measure after the winter vomiting bug affected a number of wards.
The number of people in the South West who have gone to their doctor complaining of stomach bugs has trebled in the past few months.
Norovirus - which is also known as the winter vomiting bug - is easily spread and outbreaks are difficult to control.
Symptoms include sudden onset of nausea followed by projectile vomiting and diarrhoea. Some people also get a high temperature, headaches and aching limbs.
People in hospital are particularly at risk. Many hospitals including Bristol's Royal Infirmary are restricting visiting hours. Four wards are currently affected at the RUH in Bath and Berrow ward is closed at Weston General.
Weston General Hospital is restricting visiting hours over Christmas to try to keep the hospital free from norovirus. There's been a huge rise in cases of the winter vomiting bug across the country, including North Somerset. Visiting is restricted to an hour a day with two vistors per bed.