Lemon water helps flush out the toxins in your body. It aids in giving your skin a healthy look. It is known to relieve digestion problems and constipation. Lemon water has numerous benefits. I have not heard of any one getting hiccups after drinking hot lemon water, In fact I have lemon juice to get rid of the hiccups. I would suggest you try warm lemon water instead of hot lemon water. Do not gulp the whole glass in a min, give a few seconds between each sip. You could try having lemon with room temperature water. Try these methods. Hope it helps you my friend.