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You could be having mild fluid in your ears or some obstruction or oedema of your Eustachian tube opening in the ear due to cold
, or rhinitis
. There are various home remedies
which can reduce hiccups. If it does not go on it's own there must be some pathology which needs t be found. Better to get examined by Doctor and also get good medicine to stop the hiccups, based on what's causing the hiccups which needs to be treated first.