What should you know about bronchiolitis caused by RSV?

Respiratory syncytial virus, often shortened to RSV, can begin with a runny nose, reduced appetite, or cough. In some young children it progresses into bronchiolitis, with swelling and mucus in the small airways. Most symptoms are judged by how the child is breathing and drinking rather than by a positive label alone. A child with RSV may have no wheeze, while another may have noisy breathing; both need observation based on their overall condition.

Offer regular small amounts of milk or fluid, allow extra rest, and keep the nose as clear as possible before feeds. Clean hands and frequently touched surfaces, and limit close contact with infants or vulnerable family members while the child is unwell. Do not start antibiotics or other medicines without clinical advice. A child health consultation can check breathing effort, hydration, and the need for follow-up.

Call emergency services for blue or grey lips, severe struggle to breathe, repeated pauses, collapse, or difficulty waking. Seek prompt care when the child cannot take enough fluid, vomits repeatedly, has noticeably fewer wet nappies, or develops increasing chest recession. Babies with underlying heart or lung problems may need advice earlier in the illness.

Ask how to measure the child's breathing pattern while settled, how to maintain feeds, and whether household contacts need extra precautions. Confirm which symptoms should prompt an immediate return and whether testing would change the care plan.