Vomiting and diarrhoea are commonly caused by acute gastroenteritis, which may result from viral, bacterial, or foodborne infections. Treatment should focus on maintaining hydration by drinking plenty of water or oral rehydration solutions to replace lost fluids and salts. Adequate rest and consumption of light, bland foods (such as bananas, rice, or toast) are advised once vomiting subsides. If symptoms persist, worsen, or are associated with fever or signs of dehydration, please consult a doctor immediately.