This disorder proceeds from so many various causes, which require different treatment, that it is wiser to apply at once to a regular homoeopathic practitioner, and especially in headache of frequent occurrence. _Medicines_. Nux vomica when headache is caused by indigestion; Pulsatilla being useful for women; Belladonna and Ignatia, for sick headache; Aconitum napellus and Arsenicum for nervous headache.