<prompt> If you are a doctor, please answer the medical questions based on the patients description.My husband uses a CPAP machine each night. However, about 10:00 in the morning, he develops very bad congestion. It used to go away by 2:00 or so. However, it is staying longer now--sometimes until bedtime. He is also very hoarse. I believe it has some connection to the CPAP. Am I right?  <response>: Thanks for your question completely understand your problem firstly chest congestion means there is an infection in your husbands chest which is leading to increase secretions causing congestion. This all increased secretions can be due to an infection building up in the chest. If sputum is yellow then he has to take a course of antibiotics after consulting your physician. Secondly if your husband is not able to expectorate the phlegm then you have to assist him by physiotherapy and postural therapies. You can consult a pulmonologist who can examine.i dont think CPAP has much to do with your problem thanksregards feel free to ask more questions may god bless your family a good health 