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.
Condensation usually appears in cold weather on the glass and/or frames of windows and sliding glass doors. It can block out the view, drip on the floor, and freeze on the glass. It's annoying. While it is natural to blame the windows, you shouldn't. Window condensation is the result of excess humidity in your home.