dioscorea villosa
Persons of feeble digestive powers, old or young. Flatulence after meals or after eating, especially of tea-drinkers; are often subject to violent colic. Griping pains in abdomen about umbilicus. Violent twisting colic, occurring in regular paroxysms, as if intestines were grasped and twisted by a powerful hand. Colic pains: < from bending forward and while lying; > on standing erect or bending backwards (rev. of Col.). Emissions during sleep; vivid dreams of women all night (Staph.); knees weak; genitals cold; great despondency (Staph.). Felons; early when pains are sharp and agonizing, when pricking is first felt; nails brittle. Disposition to paronychia (Hep.).
< Lying; sitting; bending double.
> Motion; walking difficult, compelled to walk even though tired.