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Materia Medica Viva Volume 7 – page 1623

Fever, Chill, and Perspiration
Coldness and chill predominte (compare the description in the ‘Generalities’ section). Characteristic is chill with great thirst, particularly for cold drinks, whereas during heat the thirst may be wanting altogether. ‘Chill, with a marked degree of thirst; no thirst, or but slight during fever, but patient wishes to be fanned all the time, as if to compensate for the lack of thirst.’
Shaking chill with blue finger nails. Clarke describes ‘a typical case of Carbo vegetabilis intermittent: headache for one or two hours before the chill. Chill always from 9 to 10 a.m., beginning in feet and hands, spreading over body; nails very blue.’
Strong tendency to sweat, especially about the head and face, also generally at the upper part of the body; inclined to catch a cold from it. Profuse perspiration at night, worse before midnight, and in the morning. Sweat during and after eating. The perspiration may exhaust the patient, and it tends to have a putrid or sour odour and is often cold.
Shivering in the evening, with fatigue, and before going to sleep a flush of heat ensues. Frequent flushes of heat; also after drinking wine, or combined with anxiety and pain.
Feeling of heat internally while the body feels cold to the touch.
Skin
Blue and cold surface, often with ecchymoses. ‘Blue colour of body, with terrible cardiac anxiety and icy coldness of whole surface’ (Noack/Trinks). Carbo vegetabilis has a good reputation in ulcers, especially indolent ulcers, even those with a tendency to necrosis and gangrene (see ‘Generalities’).
The provings elicited this symptom: ‘An ulcer which had already healed breaks up again and discharges serum mixed with blood instead of pus; the place is hard and pains on touch.’ Wounds become gangrenous. Decubitus; senile gangrene beginning in the toes.