Croup often begins as an ordinary cold. If there's enough swelling, irritation and coughing, a child can develop: 
Loud barking cough that's made worse by crying and coughing, as well as anxiety and distress, setting up a cycle of worsening symptoms.
Fever.
Hoarse voice.
Noisy or labored breathing.
 Symptoms of croup are often worse at night and usually last for 3 to 5 days.