Brief Answer:
Hormonal, hypoglycemia, near hypoglycemia

Detailed Answer:
Good afternoon. The symptoms you describe of feeling clammy and wet without the presence of perspiration is one that is commonly seen in persons who suffer from hormonal disturbances or diabetics/prediabetics who are having difficulties controlling their sugars in some way. One of the red flags of blood sugar which is dropping quickly (even though it may not actually reach true HYPOglycemic levels) is precisely the symptom of diaphoresis (without actually being diaphoretic). These are the symptoms you're describing. The reason that a shower or middle of the night time frame may actually help to improve symptoms is thought to be due to increased blood sugar levels as well as a mild drop in blood pressure following showering (very common due to dilation of the arteries in the body) which can COUNTER the sensation effect that you're describing. Blood sugar levels also tend to go up during and after a shower since the body can interpret the experience as a physiological stressor which at age 82 you may not have the same strength of resources to withstand from a physiological point of view as you did years ago when these symptoms didn't exist.

I would not try TOO DILIGENTLY to keep your blood sugars as close to 100 and let them ride a bit closer to 120...though everybody is talking about 100 these days. Having a glycemic index of 100 is FINE so long as your body regulatory systems are adversely reacting or so long as you are not UNKNOWINGLY dropping too far below the 100 mark which you may be doing without really wanting to....that's when you may get the symptoms.

The way to look into what I've said is to take your blood sugar the next time you're having these symptoms and document them. That could provide the necessary data for your doctor. Don't forget to document the time of the day and how far away from meals you may be....

Other things to consider whenever talking about these sorts of changes would be anything hormonal which can commonly be seen in people as they age. Therefore, I would check thyroid, cortisol, testosterone, Vitamin D, and Vitamin B12 levels as a start if the idea of hypoglycemia doesn't seem to pan out to fix what you've got.

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