Medical questions & health advice by board certified doctors

"Can you be overweight and have cystic fibrosis?"

ZocdocAnswersCan you be overweight and have cystic fibrosis?


My friend thinks that I have cystic fibrosis but I don't think so because I am overweight and I thought that people with that were always really skinny. Can you be overweight and have cystic fibrosis?


Cystic fibrosis is a chronic medical condition that is caused by mutations in certain proteins that are important for the normal functioning of the lungs and other organs that are lined by mucus-secreting cells. Typically, cystic fibrosis symptoms are most commonly trouble with recurrent lung infections that become worse over time. Because of this, most people with cystic fibrosis are quite skinny, because they tend to be ill frequently and have trouble with good nutrition. This is not always the case, however, and there are multiple cystic fibrosis variations that are much milder and can occur in people who are overweight. In fact, there are some very mild cases of cystic fibrosis that are not even diagnosed until people are adults! I cannot comment on your particular case, because I do not know what your symptoms are like. However, I will say that if your symptoms include things like cough, lung infections, and sinus congestion, there are many other much more common causes of these symptoms other than cystic fibrosis. If you have not talked to your primary care doctor about your symptoms yet, you should definitely do so, as they will be able to help you figure out what is going on.

Zocdoc Answers is for general informational purposes only and is not a substitute for professional medical advice. If you think you may have a medical emergency, call your doctor (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under Zocdoc’s Terms of Service.