Try the following tips to deal with your lung infection.

• If you are susceptible to cold and cough then try to get rid of them, as they can put undue stress on the lungs. If you have persistent cold and cough then try taking steam from boiling water. This is a very effective remedy to get rid of cold and lung congestion.
• Rest. Do not take any physical strain and avoid any heavy activities as they can stress the body.
• To improve your lung capacity after an infection it is very important to avoid smoking, chewing tobacco and drinking alcohol completely.
• Perform simple breathing exercises. Consult a specialist before starting them.
  

If the infection persists then consult a specialist to know the exact cause for the infection for appropriate treatment.