Lemon can help relieve many digestion problems when mixed with hot water. These include nausea, heartburn and parasites. Due to the digestive qualities of lemon juice, symptoms of indigestion such as heartburn, bloating and belching are relieved. By drinking lemon juice regularly, the bowels are aided in eliminating waste more efficiently. Lemon acts as a blood purifier and as a cleansing agent. The intake of lemon juice can cure constipation. It is even known to help relieve hiccups when consumed as a juice. Lemon juice acts as a liver tonic and helps you digest your food by helping your liver produce more bile. It decreases the amount of phlegm produced by your body. It is also thought to help dissolve gallstones.