Hello @jtpokerguy and welcome to the discussion. The mucous is not unusual and should subside eventually. This is not a good thing we do to ourselves to kill the cancer, almost a contest of what will win in the end and hopefully it is the patient. What is the status of your husband such as how long out of radiation or in what week of treatments?
Encourage your husband to read some of these discussions in the head and neck group. He can search on specific issues such as mucous, swelling, etc. You can also start a "discussion" about anything related here where you will get feedback directed to you.