General Symptoms.

The symptoms of bacterial pneumonia develop abruptly and may include chest pain, cough, fever, shaking, chills, shortness of breath, and rapid breathing and heart beat.
Symptoms of pneumonia indicating a medical emergency include high fever, a rapid heart rate, low blood pressure, bluish-skin, and mental confusion.
Coughing up sputum containing pus or blood is an indication of serious infection.
Severe abdominal pain may accompany pneumonia occurring in the lower lobes of the lung.
In advanced cases, the patient's skin may become bluish (cyanotic), breathing may become labored and heavy, and the patient may become confused.