What are the first signs of whooping cough?

The first signs of whooping cough are similar to a cold and include sneezing, a runny nose, mild coughing and a low-grade fever below 102 degrees, according to WebMD. Some patients experience diarrhea within the first few days.

Coughing spells accompanied by a whooping sound when breathing typically develop within seven to 10 days of the illness, explains WebMD. Coughing spells can last up to one minute and cause the face to turn purple or red. People with whooping cough do not usually produce mucus, resulting in a dry cough. Not all patients with whooping cough experience coughing spells. The condition can affect both adults and children. Someone experiencing the symptoms of whooping cough should consult a physician.