When I say to get out of your head and get into your body what I mean is to get out of the thinking, left-brain mind and get centered in the feelings, which are primarily located in the body. If you have a physical feeling in the head, there is no problem focusing there as you process the sensations associated with it. Pressure in the head relates to an energetic congestion. Treat it like you would any body sensation - apply the process to it. Feel it on a physical level, and then if emotional feelings come up, shift to them.