I have a ton of these things. I used to think they were inflamed and knotted muscles, but my massage therapist tells me otherwise. I have a hard time telling which lumps are lipomas and which ones are myofascial trigger points, especially since most of them are in my back, so I'm not sure if any of mine are painful.
Humidity. The most common cause of condensation on double-glazed windows is humidity. The outside window is colder than the inside window causing fog or frost to build up in-between the two panes. The window and house is extremely airtight and cannot breath.
Windows don't cause condensation. Warm air holds more moisture than cold air.The air in your house is warmer in the center of a given room. As the air moves toward the outer walls of your house it cools holding less moisture. Your window glass cools faster than your walls do (walls also absorb moisture but glass doesn't) so you see the effect on the window glass first. It's also in your plaster walls and possibly in the insulation inside your walls. Cold air leaking in around your windows will also cool the existing air and form moisture on your windows.