This was the answer I put up a couple of weeks ago to the same question.

Ok scratching, itching at their bottom, tickling feeling in the bottom, insomnia, general irritablilty, are the most common of symptoms. To be sure, the best way to see them is in a darkened room, shine a torch on their bottom, gently spreading the cheeks apart. You will see them there if they are.

Treatment: Go to the chemist/pharmacist and get some worm tablets. Then take them as per the instructions. The main thing to remember is to make sure that you dose EVERYONE in the household, wash all bedding and clothing in hot water to destroy any eggs or larvae, clean toilet seats well, reinforce good hygiene habits - washing hands well, keeping fingernails clean, don't scratch ; change underwear daily.

Remember too that this is a very common childhood ailment. I actually dose my family every 6 months just to be on the safe side.

There are lots of pieces of advice on here as well. I have included some links above, just under your question.

don't worry,  i just got a scray the other week as my kids  got worms for the frist time . the signs are if they are scracing there bottoms alot  are one of the main signs of worms .

Like nits u have to change all bed  sheets and wash them  and made sure you wash under there nail  as that where they get into as well and made sure u wash your hands  when u wake up as they say u never where u been sraching at night when your asleep.

The chemist have tablets which u can get one dose and that its  .Its best to do  this evey six to twevel months this way u want get worms. I hope this helps

julie

 Don't worry, kids get them quite often. The joys of parenthood! Dannii's link has all the info. You just need to go to the chemist. They should be able to give you medicine that is 1 dose, 1 time  for each family member. Quick and simple. If you have pets, they will have to be treated as well.

Hi this should tell you everythign you need to know and let me tell you they are common.  http://www.rch.org.au/kidsinfo/factsheets.cfm?doc_id=3732