The south pole of the magnet stamps the organism with excitability and readiness: ready to flush, ready to bleed, ready to spark with electric-like pains. The patient is not crashing into destructive states but vibrating in a field of functional over-reactivity. This is seen in left-sided neuralgia with pains that dart like a current along tracks; in vivid, unrefreshing dreams that prolong daytime excitement; in palpitations that rise and fall with the room’s warmth or the mind’s stir; and in bright haemorrhages that start from small causes. The modality scheme is elegantly simple: worse at night, worse lying still in bed, worse warmth of room/bed, and better from cool, moving air and gentle continued motion. This polarity—heat and stillness excite, coolness and motion soothe—belongs to the remedy’s very source, a phenomenon of polarity seeking balance.

In the female sphere the remedy is particularly serviceable: menses early, profuse, neuralgic dysmenorrhoea on the left, pruritus with pricking, and a bearing-down uneasiness that eases with walking. In the head and extremities we find the same signature—left supra-orbital and left sciatica-like tracks that flare on lying down and abate while walking; scalp or skin prickling as from sparks; a sensory world turned up too loud. The mind is awake, able, and lively yet easily over-wrought; small noises sting, trivial worries amplify, and sleep is a theatre of bright dreams. Haemorrhages are bright and ready, not passive or purplish; after them the patient is weak but still labile, and often needs China or Ferrum when the vascular pendulum has been steadied. The remedy sits between Phosphorus (bleeding, sympathy, chest affinity) and Lachesis (left-sided congestion, heat, loquacity), but remains smaller, more electric-neuralgic and less systemic; it refines our aim when the totality distinctly points to polarity: left-sided, electric pains; night/bed aggravation; cool-air relief; and haemorrhagic readiness. Selecting M-aust. is the art of noticing this field of excitability and prescribing to restore equilibrium. [Hahnemann], [Clarke], [Hering], [Farrington].

Sol’s essence is human sensitivity to light and heat—not merely the meteorologic “hot day,” but the actinic, glaring, penetrating quality of sunlight that dazzles the eyes, stirs the circulation to the head, pricks and reddens the skin, and unsettles the nerves. The central polarity is attraction to brightness and open air versus hurt by direct exposure: the person longs to be outside, yet is quickly overborne by glare; they rally in evening shade. This signature fits the imponderable nature of the source (light, not matter), and explains why symptoms are sensory-neurovascular more than strictly organ-pathologic: photophobia; throbbing, light-provoked headaches; erythema, prickling sweat; irritability in glare; faintness in hot close rooms; and a diurnal curve peaking around midday and remitting at night [Clarke], [Hughes].

Miasmatically, psora speaks in the heightened reactivity and itching heat-rash; sycosis in recurring summer aggravations and photosensitive patches; syphilitic hints surface in stubborn pigment changes or chronic, sun-bitten dermatoses [Kent], though Sol seldom suggests destructive tendencies per se. Compared with Glon., Sol’s vascular storm is provoked by light/heat and quiets promptly in darkness, whereas Glon. may be overwhelmed independent of illumination. Compared with Nat-carb., Sol is less about gastric atony and constitutional weakness and more about glare-linked sensory distress; compared with Bell., Sol lacks delirious violence and crimson intensity. Against Euphr., Sol’s tears do not typically excoriate; against Urt-u., Sol’s urticarial/prickly element is clearly sun-triggered. The organ affinities (Skin, Head, Eyes, circulation) interlock through the common modality—worse sun, better cool darkness—giving the prescriber a confident keynote to hang the case upon.

In practice, Sol serves in acute after-effects of sun (sunstroke tendencies, sun-headaches, sun-rash) and in chronic photosensitivity (recurrent summer migraines; photophobia in outdoor workers; “prickly heat” and erythema solare). The practitioner should also think of Sol when a case repeatedly collapses around light itself—beach glare, reflected brightness from snow, white walls—and when simple environmental inversions (dark, cool, quiet) dramatically ameliorate. As with all imponderables, potency choice can be flexible; many authors favour medium-to-high potencies for functional, reactive states, intercurrent with supportive measures (hydration, shade, gradual exposure)—practical “antidotes” that mirror the remedy’s own ameliorations [Hughes], [Clarke]. The essence is thus the discipline of light: to restore proportion between organism and environment so that light nourishes rather than scorches.

X-ray addresses the energetic fragmentation and disintegration of the vital force caused by excessive exposure to radiation, technology, or suppression. At its core is a loss of coherence—the individual becomes disoriented, physically depleted, and emotionally severed from their inner vitality. It is especially relevant in the modern era, where overstimulation and artificial radiation disrupt natural rhythms. This remedy supports restoration of rhythm, detoxification, and reintegration of the self, particularly after deep suppression or environmental insult.