Can pulmonary hypertension cause troubles breathing?

Yes. Common symptoms include breathlessness, chest pain, dizziness, chronic fatigue, edema (leg swelling), and light-headedness or fainting at rest or with exercise.
Definitely! Pulmonary hypertension means that the blood vessels inside your lungs have higher pressure in them than is normal. This in turn puts strain on the chambers in the right side of your heart. In the worst cases, your heart can fail and cause fluid to build up in your body. It's very important to be in the care of a doctor with specialized training in this condition. Medications can help!
Yes. Shortness of breath and limitation of ability to exert are the most common symptoms of pulmonary htn.