A SCOTTISH health board has issued an urgent warning following an "extremely contagious" outbreak. NHS Borders has urged people not to visit loved ones in hospital amid an increase in the number of patients with norovirus. The illness is a stomach bug that causes vomiting and diarrhoea. In a statement, the health board said it is experiencing "significant pressure across the healthcare system with long waits for admission to the Borders General Hospital." Anyone feeling unwell or experiencing symptoms of infection is being urged to not visit family or friends in healthcare settings. This can help prevent the spread of illnesses to vulnerable patients who are more susceptible to tummy bugs and other common illnesses which visitors can unknowingly pass on. Hand hygiene is the most effective way to protect yourself and your family and friends from infections. When you are attending hospitals or health centres, wash your hands with soap and water or use the hand gel dispensers available on entering and leaving the building, and individual wards and departments. Sarah Horan, Director of Nursing, Midwifery and Allied Health Professionals, said: "Norovirus is circulating in our communities. We know how much it means to visit loved ones in hospital, but we must do everything we can to reduce the spread of illnesses. "What feels like a minor stomach bug or cold to you could have serious consequences if passed on to someone who is already unwell. "It is therefore essential that everyone plays their part in preventing the spread of these infections. "One of the simplest ways of protecting yourself and your loved ones is by regularly washing your hands with warm water and soap. "Hand sanitiser is conveniently placed around healthcare settings, so when you see it, please use it, especially if soap and water is not immediately available. "By staying home if you are feeling ill and practising good hand hygiene when visiting healthcare settings, you are playing a vital role in keeping our patients, staff and wider communities safe."