You are right in saying that headache which is constant is unlikely to be cluster headache
. One has to be very cautious in elderly who has headache restricted to one side and is also associated with eye pain
. She definitely needs evaluation to rule out serious causes of such headache. Bumps on forehead is another worrying thing can be commented on only after having a look at it. Get in touch with a neurologist
who will further guide you regarding this.