cold or getting wet. Another cause may be the suppression of an eruption, as in a case of Clarke where the treatment of a Zoster at the left upper arm was followed by paralysis, especially of the deltoid muscle, with sensory and motor losses. After Causticum the paralytic symptoms receded and finally disappeared completely.
The deltoid muscle, especially of the right side, is a special locality of the weakness of Causticum. ‘Cannot raise hand to head.’ But the paralytic symptoms may appear in other parts, too: paralytic weakness of right arm (especially felt while writing); of both forearms, can hardly lift them; sensation of paralysis in the right hand; also of the lower limbs, with stumbling and easy falling when walking.
Contractions and indurations of tendons and also of muscles are, as mentioned above, a well-known feature of Causticum. They tend to affect the flexors, drawing the limbs crooked. This is particularly seen in the elbow and knee joints, and in the small joints of the hands and fingers. The following are some proving symptoms that are useful in this respect: pain in the left elbow bend when extending the arm, as if a tendon were too short. Tensive pain and stiffness in the hollow of the knee, when walking. Tension in the bend of the right thigh, in the morning on rising and bending the knee. A drawing sensation in the calf as if the right leg were shorter, on rising from a seat and on walking. The knuckles are tense on bending the fingers.
Causticum is a prominent remedy in Dupuytren’s contracture; compare Hahnemann’s proving symptom: ‘Drawing pain from carpal bone through metacarpal into little finger, worst in its tip; on extending it, the pain is still worse and induces involuntary contraction of the finger; after that, the drawing pain from the ossa carpalia also affects the other fingers and draws them crooked, now more now less.’
Stiffness in all joints; especially after rest, has problems to ‘get going’ again. Gouty and rheumatic pain is found in all extremities, sometimes in several at a time. It tends to be of a drawing and tearing character, often starting or worst in the joints and extending through the long bones. Aggravation by dry weather (even if clear and fine), in the open air, especially if cold; ameliorated in wet weather, ‘in the rain’ as Margery Blackie says, and by warmth (of bed or otherwise). Rheumatism with burning pain in joints may also be cured by Causticum; Boger recommends it in acute articular rheumatism with bursting,