I believe that dreams are usually speaking of the unconscious, messages about things that you aren't fully aware of. You already know you have headaches, and this dream seems to speaking about them. But it may be making you aware of something that isn't currently within your awareness. For instance it might be trying to make you aware of your reaction to the headaches. "Seeing red" would be anger. Are you conscious of your reaction to the headaches? Do you have emotions like anger, sadness, or fear? Are you aware of any subconscious attempt to get them to go away, liking "pushing on them" through muscle tension?