Bronchiolitis is an infection that causes the tiniest airways in your child’s lungs to become swollen. This can make it more difficult for your child to breathe:
- Bronchiolitis is caused by virus infections
 - It is common in winter months and usually only causes mild cold like symptoms
 - Most children get better on their own
 - Some children, especially very young ones, can have difficulty with breathing or feeding and may need to go to hospital