Nasal congestion is very common in children, but when a child is “often blocked up” it may not be just an ordinary cold. The key to distinguishing the cause lies not in a single observation but in assessing the duration, accompanying symptoms and pattern of occurrence. With these clues, parents can usually determine whether the problem is a common cold, allergic rhinitis, or something more persistent such as sinusitis or enlarged adenoids (adenoid hypertrophy).
If the nasal congestion starts suddenly and lasts only a few days up to a maximum of 10–14 days before gradually improving, it is most likely a common cold.
In contrast, if the congestion persists for more than two or three weeks, recurs over several months, or follows a pattern such as “blocked as soon as back at school, worse at night or first thing in the morning”, and shows no clear sign of resolution, then allergic rhinitis or another chronic cause should be strongly suspected.
Nasal congestion caused by a cold rarely occurs in isolation. It is usually accompanied by a runny nose, sore throat, cough, mild fever or general tiredness. The nasal discharge may begin clear and later become thicker or yellow-green, but this does not necessarily indicate a bacterial infection. The hallmark of a cold is that the worst symptoms occur in the first few days and then improve day by day. If symptoms are still worsening after day 10, or there is “double sickening” (initial improvement followed by sudden deterioration), consider whether sinusitis or a middle-ear infection has developed.
The most typical features of allergic rhinitis are nasal itching, itchy eyes, bouts of sneezing and clear, watery nasal discharge. These symptoms are often particularly noticeable in the morning on waking, after cleaning bedding or when in contact with dust mites. Young children may not be able to describe feeling “itchy”, but parents may notice frequent nose-rubbing, the “allergic salute” (rubbing the nose upwards with the palm of the hand), eye-rubbing or a nasal voice. Another important clue is the absence of fever; the child’s energy and appetite usually remain largely normal, yet persistent blockage can lead to poor sleep, daytime tiredness and reduced concentration.
When nasal congestion lasts a long time and is accompanied by thick nasal discharge, bad breath, a cough that worsens when lying down or post-nasal drip, sinusitis should be suspected. Young children may not describe “facial pain” clearly but may complain of headache, wake frequently at night or have a cough that will not settle. Sinusitis often follows directly after a cold, resulting in prolonged “coughing and blocking”.
If nasal congestion is particularly severe at night, the child breathes through the mouth for long periods, snores, seems short of breath while sleeping, speaks with a very nasal voice or has repeated ear blockage or middle-ear infections, enlarged adenoids should be considered. This is not always due to infection; it is often caused by structural issues combined with chronic inflammation that blocks the back of the nose.
If allergic rhinitis or dry nasal lining is suspected, two measures often bring good relief:
During a cold, focus on plenty of fluids, rest and good ventilation. Do not request antibiotics straight away.
If nasal congestion lasts longer than 10–14 days with no clear improvement, recurs and affects sleep or learning, or if any of the following appear, arrange an ear, nose and throat (ENT) assessment without delay:
Early clarification of whether the problem is a simple cold aftermath, allergic rhinitis, sinusitis or adenoid-related blockage allows targeted treatment so the child can finally breathe freely again.
