Nelie,

My husband also has alot of phlegm and we rented a portable suction machine to suck out the phlegm on regular basis. ( very similar to the one at your dentist but smaller and very efficient) It was a nifty little machine and our insurance paid for it's rental. Your doctor can prescribe one from a medical supply company that they work with. Believe me, they have a company that they work with. I am amazed that more people aren't using one. It was such a relief for David to use. It was easy to clean too.