context: Idiopathic pulmonary fibrosis ( IPF) causes scar tissue to grow inside your lungs. Usually, when you breathe in, oxygen moves through tiny air sacs in your lungs into your bloodstream. From there, it travels to organs in your body. IPF scar tissue is thick, like the scars you get on your skin after a cut. It slows oxygen flow from your lungs to your blood, which can keep your body from working as it should. Low oxygen levels and the stiff scar tissue make it hard to breathe. There's no cure for IPF. The illness will affect your life and your family. For most people, symptoms don't get better, but there are new treatments that can slow the damage to your lungs. Everyone's outlook is different. Some people will get worse quickly, while others can live 10 years or more after they are diagnosed. There are therapies to help you breathe easier and manage your symptoms. In some cases, you may be able to have a lung transplant. Some people get pulmonary fibrosis when they're exposed to something in their environment, like pollution, certain medicines, or an infection. But doctors don't know what causes IPF. That's what "idiopathic" means. You might be more likely to get IPF if you: Smoke cigarettes Breathe in wood or metal dust at work or home Have acid reflux disease Sometimes, IPF runs in families. Doctors think broken genes could cause the disease in some people. No one knows yet which specific genes may be involved. You can have IPF for a long time without noticing any symptoms. After many years, the scarring in your lungs gets worse, and you might have: A dry, hacking cough that doesn't go away Shortness of breath, especially when you walk or do other activities You might also notice that: You feel more tired than usual Your joints and muscles ache You've lost weight without trying The tips of your fingers and toes have gotten wider, called clubbing IPF is hard to tell apart from other lung diseases because it shares many of the same signs. It may take time and a lot of visits to the doctor to get the right diagnosis. If you have trouble breathing that doesn't get better, you'll probably need to see a pulmonologist, a doctor who treats lung problems. The doctor will use a stethoscope to listen to your lungs. She might ask questions like: How long have you been feeling this way? Have you ever smoked? Do you work with chemicals at your job or home? What kinds? Has anyone in your family been diagnosed with IPF? Do you have any other medical conditions? Have you ever been told you had the Epstein- Barr virus, influenza A, hepatitis C, or HIV? Your doctor also will give you one or more of these tests: Chest X-ray. It uses radiation in low doses to make images of organs inside your body. Exercise test. You walk on a treadmill or ride a stationary bike while someone checks the levels of oxygen in your blood through a probe on your fingertip or attached to your forehead. High-resolution chest CT, or computed tomography. This is a powerful X-ray that makes detailed pictures of your lungs. It can help find out how severe your IPF is and possibly the cause. Biopsy. The doctor removes small pieces of your lung tissue and examines them under a microscope. This may be done with surgery or with a flexible tube filled with a small camera that looks down your throat and into your lungs. The flexible tube approach is called a bronchoscopy. During the bronchoscopy, a doctor will use fluid to wash out your lungs and remove cells to study them. This usually happens in a hospital, and you'll be asleep for it. Pulse oximetry and arterial blood gas tests. They measure how much oxygen is in your blood. Spirometry. You blow as hard as you can into a mouthpiece attached to a device called a spirometer. It measures how well your lungs are working by showing how much air you can blow out. How do you know I have IPF? Do I need any more tests? Do I need to see any other doctors? What treatments might work best for me? How will they make me feel? Will anything help me breathe better right away? Are there any clinical trials that would be good for me? How often should I see you? Will I need a lung transplant? Will my children get IPF? Treatments for IPF won't cure the disease, but they can make it easier for you to breathe. Some may keep your lungs from getting worse quickly. Your doctor may recommend a few options: Medicine. Two drugs, nintedanib ( Ofev) and pirfenidone ( Esbriet), are approved to treat IPF. Scientists are still finding out exactly how they work in the lungs, but they do know these treatments can slow down scarring and damage in your lungs. Oxygen therapy. You breathe oxygen through a mask or prongs that go in your nose. It boosts the oxygen in your blood so you have less shortness of breath and can be more active. Whether you need to wear oxygen depends on how serious your condition is. Some people with IPF need it only when they sleep or exercise. Others need it 24 hours a day. Pulmonary rehabilitation. You work with a team of doctors, nurses, and therapists on ways to manage your symptoms. You might focus on exercise, healthy eating, relaxation, stress relief, and ways to save your energy. You may visit the hospital for a rehab program or do one at home. Some people with IPF can get a lung transplant. Doctors usually recommend it for someone whose illness is very severe or gets worse very fast. Getting a new lung or lungs can help you live longer, but it is major surgery. If you fit the criteria for a lung transplant, your doctor will put you on a waiting list for a lung from a donor. After your transplant, you could be in the hospital for 3 weeks or longer. You'll need to take drugs for the rest of your life that keep your body from rejecting your new lung. You'll also have lots of tests to see how well your lungs are working and regular physical therapy. If you're considering a lung transplant, you'll need emotional support from family and friends. Support groups can help by putting you in touch with people who are also getting or have had transplants. Ask your doctor about programs that can help explain what to expect before and after the surgery. Scientists are also studying new treatments for IPF in clinical trials. These trials test new drugs to see if they are safe and if they work. They often are a way for people to try new medicine that isn't available to everyone. Your doctor can tell you if one of these trials might be good for you. IPF is a serious disease, and it will have a big effect on your life and your loved ones. To stay as healthy as possible, follow your treatment plan and see your doctor regularly to make sure your treatment is working. There are other things you can do to feel better: Eat healthy. A well-rounded diet of fruits, vegetables, whole grains, low-fat or fat-free dairy, and lean protein is good for your body in general. Eating smaller meals more often will also give your lungs more room to breathe. Exercise. Take a daily walk or bike ride. It can strengthen your lungs and reduce stress. If it's hard to breathe when you're active, ask your doctor about using oxygen during your workouts. Quit smoking. Cigarettes and other tobacco products damage your lungs and make breathing problems worse. Your doctor can recommend programs to help you quit. Get a flu shot. Vaccines can protect you from infections like the flu or pneumonia, which can harm your lungs. You need a flu shot every year. You will also need to get two vaccines to help protect against a very serious type of pneumonia. Ask your doctor about when you should get these vaccines. Try to stay away from people who have colds. Find ways to relax. Low-key activities that you enjoy are great ways to fight stress. Try reading, drawing, or meditating. It's hard to live with an illness like IPF. Remember that it's OK to ask a doctor, counselor, friend, or family member for help with any stress, sadness, or anger you may feel. Support groups are good places to talk to other people who are living with IPF or a similar condition. They can give you and your family advice and understanding. The scar tissue in your lungs makes it hard for your body to get oxygen, which puts a strain on your other organs. IPF can raise your odds of getting other conditions, including: High blood pressure in the lungs, called pulmonary hypertension Heart attack Stroke Blood clots in your lungs Lung cancer Lung infections Ask your doctor what you can do to lower your chances of having these problems. There may be treatments that can help with these conditions, too. Everyone with IPF is different. For some people, the disease gets worse quickly. For others, it can be a slow process where their lungs stay the same for a long time. Talk to your doctor about your condition and what you can do to manage it. To learn more about IPF or find a support group in your area, visit the websites of the Coalition for Pulmonary Fibrosis and the Pulmonary Fibrosis Foundation.