My 4 y.o has got thread worm. Hes had an itchy bum at night for weeks (off and on) but it was really bad this weekend. The Dr said its itchy because they come out at night to lay eggs I have to give him 1 spoon of a liquid medicine today and wash his nails and bum each morning for the next 2 weeks. Ive never heard of these thread worms before, is there anything else that I should be doing eg burning all my bedding?