Viola Tricolor is a homeopathic remedy for skin symptoms, sore throat. Worse in winter when walking in cold air; 11 a.m.; pressure on side opposite to painful side; lying on non-painful side. Walking causes vertigo, stitches through chest and abdomen. Sitting causes stitches in abdomen and groin - standing makes it better. Better open air (helps headache but causes chilliness) - aversion to open air. SOURCE: Robin Murphy Lotus Materia Medica
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