In addition to the other answers, one might consider brow ptosis
. This occurs with age as the tissues and fascia of the forehead relax and begin to droop over your eyelids. Patients compensate by chronically furrowing their brows which may lead to brow ache. Ask your family to look at you as you unfurrow your brow. They will need to observe that you actually have done so, because this is an unconcious behavior. Treatment is surgical.