Well, emotional stress, sudden excitment may cause such symptoms. It occurs due to irritation of vagus nerve. First thing and most important- Avoid stress. avoid alcohol and taking too hot food, avoid spicy meals. When you have have hiccups, then you should - hold breath for 10 seconds, swallow a teaspoon of sugar. Usually it will slowly go away by its own. If not, then take tab metclopramide(reglan) . Also drink cold water at that time.
Hope this helped.
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