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.
You recently (November 1) responded to a problem about condensation on the outside of double-glazed windows; I have a similar problem, except mine is on the inside. I have bought a flat where double glazing was installed about four years ago. My flat is heated and there is a radiator under the window in the bedroom. I have tried lined curtains and now simply blinds, but nothing stops the condensation pouring down the inside of the windows, ponding on the sills and then dripping down the walls on cold mornings.