Sometimes threadworm infection may not present with any particular symptoms and therefore may go unnoticed.

Common symptoms of threadworm infection include:

  • Finding worms in your stools when going to the toilet or around the anal area. Worms may also sometimes be found on clothes worn at night or bedsheets.
  • Intense itching around the anus (back passage) which gets worse at night – this is as the female threadworms lay their eggs around the anus at night
  • Itching which keeps you up at night

You should see your GP if you develop other less common symptoms of threadworm infection, including:

  • Finding large worms or large pieces of worm in your poo
  • Red, itchy worm-shaped rash on your skin
  • Sickness, vomiting, diarrhoea or a stomach ache for longer than 2 weeks
  • Unexplained weight loss

Although all of our content is written and reviewed by healthcare professionals, it should not be substituted for or used as medical advice. If you have any questions about your health, please speak to your doctor.

Authored May 18, 2021 by Joseph Issac, MPharm
Reviewed Jun 15, 2021 by Prabjeet Saundh, MPharm