A severe cough with chest congestion and no mucus may be due to a viral chest infection, acute bronchitis, asthma, or thick secretions that are difficult to clear. It can happen when the airways are inflamed, and mucus becomes sticky, or when there is a dry cough with irritation. Take rest, drink plenty of fluids, and use steam inhalation to help loosen mucus. See a doctor promptly if you develop breathlessness or chest pain, or if your symptoms last more than a week.

Cough Clear-A Syrup (Ambroxol, Guaifenesin, and Terbutaline) is mainly used for a chesty cough with thick mucus and may help clear phlegm from the airways. It will not directly relieve a blocked nose, so you may still need saline nasal drops, steam inhalation, or a decongestant (pseudoephedrine) for relief. Use it only if your cough is productive, and avoid it if you have heart problems or experience palpitations or tremors. If symptoms persist or worsen, it is best to consult a doctor for proper assessment and treatment.