Symptoms Of Pneumonia In Children. With a course of appropriate antibiotics, the fever should settle within 48 to 72 hours from the start of the antibiotics. Symptoms that occur are generally such as fever, vomiting and pain in the lower abdomen.

Antibiotics are effective if your child’s pneumonia is caused by bacteria. Because of the infection, the small airways in the lungs become swollen and make more mucus (sticky fluid). Symptoms then get worse and may include a high fever, abdominal pain and difficulty breathing.