My daughter has been complaining of an itchy bum last few days and last night saw a threadworms crawl out of her bum. Have just been to chemist to buy the medicine for us all. But do I need to inform school? Also does anti histamine help with the itching. I'm now vigorously cleaning all bedding, towels, surfaces, pyjamas and carpets. Do I need to put all teddies in a washing machine she has bloody loads or will wiping them down with a anti bac wipe do the job. Also anything else I should be doing other than lots of handwashing?