How do you treat ?pulmonary hypertension?

Depends on the cause: Pulmonary hypertension can be caused by a large variety of illnesses - chief amongst them heart failure and chronic respiratory disease. These are best treated by treating the underlying illness - sometime if ph is caused in isolation or from more exotic entities like scleroderma or pulmonary embolism the correct treatment is surgery or medications directed at relaxing the pulmonary vasculature.

Pulmonary: Pulmonary hypertension is a serious disease. There are two forms, primary and everything else. Treatment is initially aimed at underlying causes such as hypoxia or scleroderma. There are meds that target the lungs blood vessels and lower the pressures. Lifestyle mods like smoking cessation are needed as well.