Types of Croup

Doctors think of croup in a few distinct types, and knowing which kind your child has explains why one child needs only a cuddle at midnight while another needs a hospital nebuliser.

1. Viral croup (the classic kind)

• The vast majority of cases: a day or two of cold symptoms, then the barking cough, hoarseness and stridor, with mild-to-moderate fever
• Caused by parainfluenza and other common viruses
• Runs its course in 2-5 days; worst on the first two nights

2. Spasmodic croup

• Sudden nighttime attacks with NO fever and no cold - the child wakes barking out of a clear sky
• Thought to be an airway over-reaction, sometimes linked to allergy or reflux
• Settles with the same measures as viral croup but tends to recur on multiple nights and across seasons; most children outgrow it by age 5-6

3. By severity - the classification that drives treatment

• Mild: barking cough but no stridor at rest - home care plus a single steroid dose
• Moderate: stridor at rest and some chest indrawing, but the child is alert - needs urgent medical care, steroids and sometimes nebulised adrenaline
• Severe: marked breathing struggle, agitation or exhaustion, poor air entry - emergency treatment, oxygen, adrenaline nebulisers and close observation

4. The dangerous look-alikes (not true croup)

• Epiglottitis: rare since the Hib vaccine, but deadly - drooling, muffled voice, severe swallowing difficulty, a very ill child with no barking cough
• Bacterial tracheitis: high fever and a toxic child worsening after "croup" began
• Foreign body aspiration: sudden onset during eating or play, no preceding cold

One-line summary

Croup comes in the common viral form and the recurrent spasmodic form, graded mild to severe by whether stridor appears at rest - and a drooling, toxic, or suddenly-choking child is something else entirely and needs emergency care immediately.