Occasional cough along with throat irritation or a feeling of mucus in the throat is commonly caused by allergy, post-nasal drip from sinus or cold, throat infection, dust exposure, smoking, acidity, or dry weather. In many people, mucus collects in the throat due to irritation from allergies or sinus drainage, leading to frequent throat clearing and coughing, especially in the morning or at night. Drinking plenty of warm fluids, doing steam inhalation, and gargling with warm salt water may help reduce irritation and loosen mucus. Try to avoid cold drinks, smoking, dust, strong smells, and very spicy or oily foods if they worsen your symptoms. If acidity is contributing, avoid lying down immediately after meals and reduce tea, coffee, and late-night eating. Maintaining good hydration and using a humid environment may also help soothe the throat. However, if the cough continues for more than a few weeks, becomes severe, or is associated with fever, breathing difficulty, wheezing, chest pain, blood in sputum, or weight loss, you should consult a doctor for proper evaluation. The doctor may check for allergy, sinus problems, acid reflux, asthma, or infection and suggest treatment accordingly.