A cough is an involuntary reflex triggered by an irritant or blockage. Productive coughs produce mucus, or phlegm; a dry cough occurs when the phlegm is not loose enough to be expelled. There are two reasons to use lime and honey as a cough remedy: to thin mucus so the body can expel it and to stop the cough from causing pain or disrupting sleep. Lime is an expectorant and will loosen mucus. Honey is an antioxidant and may soothe a throat sore from coughing.
Boil the whole lime in water until it is slightly soft, approximately 5 to 7 minutes. Then cut the lime in half and squeeze the juice out of both halves into a mug. Reserve the boiling water.
Add an equal amount of honey to the lime juice. Darker honey has more nutrients. According to Beekeeping.org, what the bees eat determines the antioxidant content of the honey. If you believe your cough is allergy related, try a local honey to help relieve allergy symptoms.
Swallow 1 tbsp. of the mixture three times a day to use it as a cough syrup.
Water down the lime honey mixture to make it into a hot tea, using the water in which you boiled the lime. It's important that the lime is organic, so there are no pesticides or wax on the surface of the lime that might contaminate the water.