The Full form of PH is Pulmonary Hypertension. PH is a type of high blood pressure that affects the arteries in your lungs and the right side of your heart. In one form of Pulmonary Hypertension (PH), tiny arteries in lungs, called pulmonary arterioles, and capillaries become narrowed, blocked or destroyed. This makes it harder for blood to flow through lungs, and raises pressure within lungs’ arteries. As the pressure builds, the heart’s lower right chamber (right ventricle) must work harder to pump blood through lungs, eventually causing the heart muscle to weaken and fail. The signs and symptoms of PH in its early stages might not be noticeable for months or even years. Symptoms become worse as the disease progresses. Its symptoms may include Shortness of breath (dyspnea), initially while exercising and eventually while at rest, Fatigue, Dizziness or fainting spells (syncope), Chest pressure or pain, Swelling (edema) in ankles, legs and eventually in abdomen (ascites), Bluish color to lips and skin (cyanosis) and Racing pulse or heart palpitations. The risk of developing Pulmonary Hypertension may be greater if you are overweight, you have a family history of the disease, you have one of various conditions that can increase your risk of developing PH, you use illegal drugs, such as cocaine etc.