There's currently no cure for chronic obstructive pulmonary disease (COPD), but treatment can help slow the progression of the condition and control the symptoms. Treatments include: stopping smoking – if you have COPD and you smoke, this is the most important thing you can do. water helps to flush out toxins from the body and cleanses the lungs in a natural way plus your body needs fluid in the blood. so that it can flow in and out of the lungs for oxygenation. it's recommended to drink up to six to eight glasses of water every single day.