5) Suppression of eruptions. This can cause severe disturbances such as chorea, epilepsy, and convulsions, but also mental alienation, even psychosis; paralysis, e.g. of the facial nerve; neuralgia, and so on. Kent gives some examples: ‘Mental exhaustion, hopelessness, despair, appearing after the suppression of an eruption with zinc ointment. He was fairly well while he had the eruption, but when it disappeared his mind gave out.’ Or: ‘Eruptions on the side of the head and face, and extending over the whole head. Thick, crusty eruptions covering the whole occiput. When these eruptions are suppressed in children, chorea is apt to follow.’
6) Cold, dry winds (compare Aconitum). Paralysis, neuralgia, or rheumatic pain is often triggered by exposure to cold dry wind or draught, while wet weather usually ameliorates the patient’s condition. However, getting wet (e.g. soaked by the rain, or bathing in a river) may also be a causative factor for a Causticum condition. Interestingly, an exposure to these influences will not so much predispose a Causticum patient to the development of bronchitis or pneumonia, but rather to disorders of the neuromuscular system (paralysis, convulsions, etc.).
Sensitivity to injustice, Sympathy for Others
Great sensitivity to injustice, and excessive sympathy for others’ suffering are the two great key-notes on the mental- emotional level.
These qualities arise in Causticum patients as a result of an inclination to observe with a pure heart, much like a child, what happens around them. The intensity of their emotions is such that they connect to the outside world and the happenings around with an extreme keenness, much like the Phosphorus patient. It seems that they have no protection from the suffering of others, it goes straight to the heart and upsets them. This is seen in the proving symptom: