What should I do if my baby's cold has improved but there is still persistent phlegm in the throat?

Generally speaking, the throat refers to the pharynx. After a baby recovers from a cold, persistent phlegm in the throat may be related to physiological phlegm accumulation, pharyngeal mucosal sensitivity, acute bronchitis, rhinitis, or adenoid hypertrophy. Prompt treatment according to the underlying cause is necessary, such as general care or medication. If discomfort persists, timely medical consultation is recommended. Detailed explanations are as follows:

1. Physiological Phlegm Accumulation

When a baby catches a cold, the respiratory tract becomes irritated and produces phlegm. Even after recovery, phlegm may remain adhered to the respiratory mucosa for a short period. It is recommended to give the baby more water to moisturize the throat mucosa and alleviate discomfort.

2. Pharyngeal Mucosal Sensitivity

Colds are usually caused by inflammatory stimuli such as bacteria or viruses. During illness, the pharyngeal mucosa might become congested and swollen, remaining sensitive for a short time afterward, with a sensation similar to small particles on the mucosa. The baby's living environment should be improved promptly, avoiding excessively low or high indoor temperature and humidity.

3. Acute Bronchitis

A cold can weaken a baby's immunity. If not properly managed, bacterial or viral infections may develop, leading to acute bronchitis. Repeated inflammation刺激 bronchial mucosa, increasing secretions that gradually form phlegm, often accompanied by coughing and fever. Medications such as ribavirin granules, amoxicillin-clavulanate potassium granules, or ambroxol hydrochloride oral solution may be used under medical guidance.

4. Rhinitis

If proper care is lacking after recovery from a cold, rhinitis may develop, causing increased nasal secretions. When secretions flow backward into the throat, the above-mentioned discomfort may occur, possibly accompanied by nasal congestion and runny nose. Treatment options include cetirizine hydrochloride drops, mometasone furoate nasal spray, and Olynne Marigold drops (Olorinum-Retard®), under a doctor's guidance.

5. Adenoid Hypertrophy

If another infection occurs after recovery from a cold, the adenoids may become inflamed and enlarged, blocking the posterior nasal passages and impairing nasal secretion drainage, potentially leading to phlegm formation. Symptoms may include mouth breathing and snoring during sleep. Treatment options include cefixime granules, oxymetazoline hydrochloride nasal spray, and compound isatis root granules, as advised by a physician.

It is recommended to identify the cause of phlegm in the baby's throat before initiating targeted treatment. Avoid self-medicating before the cause is confirmed. Additionally, proper daily care, including appropriate clothing and a balanced diet, should be emphasized during treatment to promote recovery.