If you have a cough that keeps coming back with changes in weather, dust, or air pollution, it could be due to allergies or irritation in your airways. Even if your blood tests are normal, issues like allergic cough, sinus allergies, postnasal drip, mild asthma, acid reflux, or sensitivity to pollution can still cause daily coughing. Things like smoke, cold air, strong perfumes, and dust can also bother people who are sensitive. Try to avoid these triggers as much as you can to help reduce your symptoms. Wearing a mask outside, staying away from smoke and dust, drinking warm fluids, and keeping your throat moist may help you feel better. Steam inhalation and getting enough sleep can also soothe throat irritation and congestion. If acidity or postnasal drip is part of the problem, eating late at night or having very spicy foods might make your cough worse. Since your cough has lasted even after treatment, it may help to see a chest or allergy specialist for a closer look. Sometimes, tests like chest scans, allergy checks, or breathing tests are needed even if your blood tests look normal. Consult a doctor if you have trouble breathing, wheezing, chest pain, fever, weight loss, coughing up blood, or if your sleep is disturbed by your cough.