A cough with phlegm and a feeling of mucus stuck in the chest usually happens when there is irritation or infection in the airways. It can be due to a viral infection, allergy, smoking, pollution exposure, or sometimes bronchitis. The body produces mucus to clear the irritation, which is why you feel heaviness and sticky phlegm. Right now, the focus should be on thinning the mucus and helping it come out easily. Drinking warm fluids like water, soups, or herbal drinks can help loosen the mucus. Steam inhalation for a few minutes a couple of times a day may also give relief. Avoid cold drinks, smoking, and dusty environments as they can worsen the cough. Resting well and keeping the body hydrated make recovery faster. Medicines like cough syrups or mucolytics may help in some cases, but medicines/treatment should be taken only if advised or prescribed by your doctor. If the cough lasts more than two weeks, or you notice fever, breathlessness, chest pain, or blood in sputum, it is important to get a medical check-up to rule out infection or lung-related conditions.

Continue giving Ambrolite syrup as prescribed to help loosen mucus and relieve coughing. Ensure she stays hydrated, uses a humidifier or steam inhalation at night, and keeps her sleeping area dust-free. If the cough worsens, fever develops, or breathing becomes difficult, consult a doctor promptly.

Since your 18-month-old has had a chesty cough with rattling for 20 days despite taking Maxtra, Ambrolite, and Piriton, you should consult a paediatrician. The doctor can examine the child, possibly order tests, and recommend appropriate treatment to clear the infection and prevent complications.