Sometimes people will complain of some amount of head pressure during meditation. Almost always, this is a result of some amount of efforting. If in our meditations we feel some head pressure, we should make sure that some degree of efforting has not crept into our meditation. That efforting usually comes in the form of trying to control the mind or push out thoughts. Thoughts are a normal part of meditation. When it is effortless to allow our awareness to go back onto the Self, only then do we do so.