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Materia Medica Viva Volume 10 – page 2114

Moreover, especially in children, eczema is often combined with a diarrhoea of the kind described above, or eczema and diar- rhoea alternate. The eczema may also alternate with other com- plaints, especially with a peculiar kind of cough (see below) or with rheumatic pain in the limbs or with discharges from the nose or ears.
The Croton eruption may cover any surface of the body, but it has certain preferred locations. The main locality is the male genital region, and more precisely the scrotum. In the provings, Croton time and time again causes a violently itching eruption of vesicles upon the scrotum. In females, the vulva is relatively often the seat of a skin eruption. However, face and scalp are more often host to skin disease. Croton has cured cases of crusta lactea, infantile eczema, facial erysipelas, etc.
The itching in Croton is peculiar and furnishes one of the remedy’s keynotes. It is very severe, even unbearable, but the patient is unable to scratch even moderately hard because the skin is so sensitive and sore; scratching hurts very much. However, very light scratching, or even better, very light rubbing tremendously relieves the itching. Skin eruptions with severe itching, aggravated by normal scratching, but relieved by slight rubbing or slight touch with the finger nails, is an important indication of Croton.
Croton may be indicated in dermatitis caused by contact with poison ivy, if the symptoms agree; it is an antidote to Rhus toxicodendron. In a similar way (from contact with poison ivy) instead of an eruption we may have a cough which is coupled with sensations of suffocation ‘as though the air would not penetrate deep enough into the cells’ and ‘as though the lung did not expand on breathing’. This suffocative sensation usually occurs at night, and is much worse when lying down. A keynote is: ‘cough as soon the head touches the pillow’. Sometimes the patient is compelled to spend the night sitting in a chair, because as soon as