Anita, My husband is 6 months post-radiation treatment, and even now we still have a problem with temperature control. It was especially rough the first 3 months after radiation. One minute my husband would literally be shivering with the chills...then a few minutes later - off came all the blankets, socks and what-have-you. It was bothersome for me, but in all honesty - and I hope I don't sound selfish in this statement - it was a pain-in-the-butt for me! I was constantly adjusting the temperature in our apartment and constantly covering him up - only to have him kick off the covers and turn on the fan! It's nerve-wracking, and I remember having the temperature gauge set up to practically 80 degrees at times. Although the weather is much warmer now, and things aren't as bad - he still gets into a weird hot/cold comfort zone thing every now and then, but for the most part - this has gotten much better. I would say give it time. Especially since you have already discussed this with your doctor, and he didn't seem to make much of it. I honestly don't know what causes this to happen - but I'm sure the radiation definitely throws everything out of whack, and at the same time- the body is trying to heal itself and repair the damage. Be patient, and I hope things get better for both of you soon!