Another thread about sleep apnea can be found in another section of the discussion forum. There one conjecture seems to be that a jugular vein absence is somehow causative of the apnea. That other thread is in a section related to ongoing treatment and certainly one possible cause of the apnea could be a blocked airway from a tumor. I am 4-months post-treatment and while my throat remains swollen, I was feeling that the primary cause of my sleeping difficulties (waking after every 2 hours) was the dryness. I wake with my tongue plastered to the roof of my mouth (the radiation destroyed my salivary glands). However, in my case a confounding factor seems to be frequency of urination at night. This night urinary frequency is new to me and seemingly unrelated to the neck cancer. One approach I am now taking is to stop eating or drinking after lunch