There is yellowish discharge with an odor on the child's underwear.

Yellowish discharge with an odor on a child's underwear may be due to physiological factors or pathological conditions such as vulvitis or acute cystitis. Appropriate management depends on identifying the underlying cause.

I. Physiological Factors

If the discharge results from residual urine remaining after urination and contaminating the underwear, it is recommended to change and wash underwear promptly and maintain good genital hygiene.

II. Pathological Factors

1. Vulvitis

If caused by vulvitis, inflammation may reduce local vaginal resistance. Under a doctor's guidance, medications such as metronidazole tablets, cefalexin capsules, or roxithromycin granules can be used for treatment.

2. Acute Cystitis

If due to acute cystitis, inflammatory secretions may mix with urine. Under medical supervision, treatments may include cefradine capsules or cefaclor granules.

In addition, conditions such as pyelonephritis could also be responsible. It is advisable to seek timely medical evaluation and follow prescribed treatment.