Chest and back massages and limited exposure to inspirable irritants like smoke and dust may offer some relief, too. They may help thin out mucus and relieve irritation. The following are some of the foods that you should include in your diet in order to make your cough productive as well as to accelerate the healing of an infection: Watermelons. Your throat is already sensitive when you start to cough. A cough caused by an infection sounds like a harsh, dry, persistent hack. In some cases, there’s no obvious cause. If currently a dry cough is pestering you, continue reading. Since watermelons are over 90% water, it’s a wonderful idea for you to consume them on a regular basis. Use a pillow when you sleep and take a hot shower before bedtime to reduce night-time cough spells. Many things — from allergies to acid reflux — can cause a dry cough. Sugar; Similar to alcohol, sugar can also trigger inflammation. Hence, a person who is already suffering from cough and cold should avoid foods that are rich in histamines. Instead, go for foods that are easier to swallow. Some foods to avoid are avocados, mushrooms, strawberries, dry fruits, alcohol, yogurt, vinegar and fermented foods. A dry cough is a cough that doesn't bring up mucus, but is caused by a constant irritation in the back of your throat. This cough causes inflammation to the airway, ... Keep a food diary and mark any foods that make you cough. It can have simple underlying causes like the cold or flu, and can often persist long after you've recovered from an illness. A dry cough is best dealt with through cough suppressants like honey, candy, peppermint, sundew, and carrots. This can make the symptoms of cold including cough worse. Any foods that can easily crumble, such as biscuits, crackers, and nuts, should be avoided if you have a cough. The dry, rough texture of these foods could irritate your throat further. Some common causes of dry cough are asthma, gastroesophageal reflux disease (GERD), postnasal drip and some kind of viral infection.. Other less common causes of a dry cough are environmental irritants like smoke, pollution, dust, mold and pollen that can irritate your airways; living in a dry climate; use of ACE inhibitors; whooping cough; collapsed lung; and even lung cancer in some cases. If you're using food for cough relief, try citrus fruits, berries, honey, chicken soup or spicy foods. A nonproductive cough, also known as a dry cough, doesn’t produce phlegm or mucus.