Headache with nausea, vomiting and vertigo. Facial neuralgias mostly right-sided. Thoracic oppression. Frequent and irresistible yawning. Disturbed sleep.
Citrus decumana-Grape-fruit (Tinnitus, head noises and ringing in ears. Sensation of pressure in the temporal region). Aurantium-Orange (neuralgic and skin symptoms. Itching, redness and swelling of hands. Diseases of the aged with coldness and chilliness. Boiled dried orange peel excites the intestine in a manner similar to other forms of cellulose or agar. There is an increased flow of bile which continues for hours. It unites both a cholagogue action with a mechanical stimulus to peristalsis). Compare: Citrus Limonum (scorbutus, sore throat and cancer pains; checks excessive menstruation). (Citric Acid Useful in scurvy and chronic rheumatism and hemorrhages. All forms of Dropsy are benefited with Citric acid and lemon juice, tablespoonful every 3-4 hours. Pain from cancer of tongue. Used as a local application and mouth wash, one dram to 8 ozs of water. For cancer pains generally, often effective).
Sixth to thirtieth potency.
Reference: "Pocket Manual of Homeopathic Materia Medica & Repertory" by William Boericke