Evening and night-time itching around the bottom in a 2.5-year-old is classic pinworm (threadworm), and yes he is due for deworming since it has been a year. At 11 kg the usual choice is albendazole 400 mg as a single dose (chewable/suspension), repeated once after 2 weeks because these worms reinfect from eggs. Treat everyone at home on the same day - that is the step families usually skip and then the itching returns. Cut his nails short, hot-wash bedding and inner wear, and get him to wash hands after using the toilet. Poor weight gain in this setting is often worm-related and usually picks up after treatment, but if it doesn't, get haemoglobin and a stool test done. Do confirm the dose with your paediatrician or ask me on a Practo consult and I'll write it out with his weight properly accounted for.
Answered2026-09-02 09:25:07
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