Digestive 
Blood
Cardiovascular
Dermatology
Genitourinary,
Hormones
Infections
Oncology and
Musculo-skeletal
Mental health and
Parasites
Respiratory
Senses
Various
The most common cause is smoking. If you smoke, quitting can help you to never develop the disease.
If you have emphysema, smoking cessation can stop it getting worse. Treatment is based on the severity of the symptoms: mild, moderate or severe. It includes inhalers, oxygen, medications and sometimes surgery to relieve symptoms and prevent complications.
