Cough which so hurts the larynx that the patient grasps at it.
Allium cepa may dispute place with Mercurius, so far as fluent coryza and lachrymation are concerned. The discharge from the nose is profuse, watery and corrosive. It corrodes the nose and upper lip, and is worse in the evening and indoors, and better in open air. It has also profuse lachrymation, with burning, biting and smarting in the eyes, but the discharge unlike that from the nose is bland. It does not excoriate the cheeks as does the nasal discharge the nose and upper lip ( Euphrasia is exactly the reverse, i.e., corrosive lachrymation and bland nasal discharge). There may be headache and that is also worse in warm room and better in open air. This remedy is particularly useful in children, when the profuse coryza or cold extends downward to the bronchi, with a like profuse secretion in the tubes, with cough and much rattling of mucus.
Violent catarrhal laryngitis, especially if accompanied or preceded by the characteristic coryza of this remedy, pain in larynx when coughing, causing the patient to grasp the larynx when coughing, worse on inspiring cool air and in the evening.