Pediatrics Medicine & Health

In childhood the Eustachian tube linking the middle ear to the nasopharynx is short, wide and more horizontal, so germs and secretions from the nose and throat reach the middle ear easily; larger adenoids, frequent upper respiratory infections and a still-maturing immune system add to the risk. Most acute otitis media resolves on its own, so doctors often start with observation and pain relief and reserve antibiotics for particular situations. Breastfeeding, avoiding second-hand smoke and receiving pneumococcal and influenza vaccines on schedule all lower the risk.

The key is sodium-glucose co-transport in the small-intestinal epithelium: even during diarrhoea, absorbing glucose together with sodium still drags water into the body - a discovery ranked among the most important medical advances of the twentieth century. The WHO-recommended low-osmolarity formula contains about 75 mmol of sodium and 75 mmol of glucose per litre, which works better than sugary drinks and will not worsen diarrhoea through excess osmolality. Soft drinks, sports drinks and plain water are not substitutes, and signs of severe dehydration such as no urine output, lethargy, sunken eyes or convulsions require immediate care.

A growth chart compares a child's height, weight and head circumference with a reference population by age and sex, expressed as percentiles or z-scores. What matters is not whether the child sits at the 25th or the 75th percentile but whether the long-term trend rises steadily along their own curve; short-term wobbles and familial short stature can be entirely normal. Crossing downwards through two major percentile lines, prolonged failure to gain weight or a sudden drop in height velocity signals a need to assess nutrition, chronic illness or endocrine problems. The WHO standards for ages 0-5 describe how breastfed children grow under favourable conditions.

Strong epidemiological evidence shows that prone or side sleeping markedly raises the risk of sudden infant death syndrome, probably through rebreathing carbon dioxide, blunted arousal responses and overheating. Since national “back to sleep” campaigns began in the 1990s, infant death rates from SIDS have fallen by more than half in many countries. Safe sleep also means a firm flat mattress, no soft pillows, plush toys or heavy quilts in the cot, room-sharing but not bed-sharing with parents, and avoiding tobacco exposure and overheating.