information on stoma difficulties after cancer treatments

Hello I'm new to post but have read many of your stories to educate myself for my father. What I need to know is there anyone that has had throat cancer and has a stoma. My father has been diagnois again with cancer but this time its in his lmp-nodes and a 6x6 cm. mass in his left lower lung. He has gone though all his treatments and the radation-chemo has really burned his airway and he cough up scabs and its a bloody mess. The scabs build up block his airway and he has to make himself contienue to cough until he can make it turn loose. I've bought him humifiers and tell him to drink plenty of water and walk. Has anyone experienced this themselves to tell me what you have done that might help him. His 72 and has a squamas cell nonsmall