Zinc. has a full and substantial proving, including symptoms of every part of the body. It is an antipsoric, suitable in broken down constitutions, feeble constitutions; enfeeblement characterizes the whole proving. The Zinc. patient is nervous and extremely sensitive, excitable, trembling, quivering, twitching of muscles, tearing pains along the course of the nerves, tingling, excited on the least provocation; oversensitiveness in one part and lack of feeling in another. This extreme oversensitiveness is like Nux; which is inimical. The overworked and excitable persons belong to Nux and Zinc. Nux is sensitive to the higher potencies. Further, there is paralytic weakness, emaciation, prostration; full of brain and spinal symptoms. Slowness: All the functions are slow; eruptions appear slowly. The whole economy seems to be tired and feeble, so that when a girl approaches puberty and it is time for the menses to be established, but the flow does not appear, she goes into a decline; she begins to manifest choreic symptoms, jerking and twitching, soreness in the back of the neck, burning of the whole spine, creeping and crawling of the extremities, hysterical manifestations of all sorts. Sensitive to every little noise, to people talking in the room, to crumpling of paper. "Talking or listening is distressing; much talking of other people, even of those of who he is fond, affects his nerves and makes him morose."