Pulmonary hypertension or PH is a condition where there is high blood pressure in the lungs. This condition makes it hard to breathe. Some people with the condition need extra oxygen. This condition can also make a person dizzy and become easily tired. Some people with the condition faint easily. The symptoms get worse when exercising or working hard. Pulmonary hypertension is a serious condition, and it can be fatal. The condition makes it harder for the heart to pump blood. Because the heart has to work harder, it can also become sick. Some people who are very sick may need a lung transplant or a heart-lung transplant to live. Pulmonary hypertensions full name is pulmonary arterial hypertension even though most people call it pah, ph or pha.