This is exactly what mine look like as well. This has been going on for at least 3 years. I have searched and searched and searched online for someone experiencing the same problem as me. I’ve gone to the ENT 4 times. I went last week and was prescribed Biaxin because the chunks that I am coughing up are green. So far it has done nothing. I have to get one of those children’s bulb syringes to extract the thick mucus from the back of my throat sometimes. Also, I purchased a dental mirror not too long ago along with a small pen size flashlight. Point the flashlight towards the back of your throat, while holding the dental mirror up at the top of your throat. What I saw was absolutely disgusting. It was like a giant cavity with a lot of green mucus. I even told my ENT this, and never bothered to scope me or look further in to my problem. I’m attaching some pictures of my “scabs” as well.