Pneumonia means inflammation of the lung tissue. It's normally due to infection. It's often more serious than bronchitis, which is inflammation or infection of the large airways - the bronchi. You can get both conditions at the same time. This is called bronchopneumonia.

Cough is a common symptom. You may also feel generally unwell and have a high temperature (fever). Other symptoms you may notice include: Loss of appetite, Sweating, Shivering, Headaches, Aches and pains. All these symptoms are also seen in flu (influenza) so it is sometimes difficult to diagnose pneumonia in the early stages. Coughing up a lot of phlegm (sputum) is more likely to happen in pneumonia than in flu. The phlegm may become yellow-coloured or green-coloured.