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Worms which attack the brain are tapeworms commonly. They can cause difficulty seeing, seizures, loss of consciousness
also. Usually hormonal
imbalance is the common cause of headache associated with menstruation
being a common cause needs proper treatment. Firstly she must stay away from chocolates, coffee, bright lights or loud sounds which can aggravate an attack. If conventional pain killers do not work she may try taking T.Migranil once during her headache. Best I would recommend is you must speak to her Doctor regarding proper drug treatment to prevent further attacks also.