At this point, it is only fitting to mention the meditation on or cultivation of Loving-kindness. This meditation produces an abundance of pure and unselfish joy and is the antithesis of hatred which happens to be the root cause of most types of stress. The presence of strong Loving-kindness overcomes and eases most, if not all such problems. Physical condition can also give rise to tensions in the head. We all know that when we are sick or feverish we also have headaches.
General discomfort can also do the same.
I know of a case of a girl who had tensions gripping her head when she meditates. It went off after regular exercise. It seems that she seldom exercised before. Health is indeed a very important factor for good meditation. On another occasion I discovered how one notes is also important.