Threadworm Treatment in Treherbert | NHS Pharmacy Advice

If you are looking for threadworm treatment in Treherbert, Treherbert Pharmacy may be able to assess you or your child through the NHS Wales Common Ailments Service.

Threadworms, also called pinworms, are tiny white worms that live in the gut. They commonly cause itching around the bottom, especially at night, and spread easily between people living in the same household.

Eligible NHS consultations and treatment supplied through the service are free. You can approach or book with the pharmacy directly and do not need a GP referral first. The pharmacist will confirm whether the Common Ailments Service is suitable, whether household members also need assessment and whether hygiene measures, medicine or another healthcare route is appropriate.

Choose an NHS appointment if you would like help with this condition. The pharmacist will assess whether treatment is suitable or whether you need another service.

What are threadworms?

Threadworms are small, thin, white parasitic worms that live in the bowel. The female worms come out around the anus at night to lay microscopic eggs, which often causes intense itching.

The infection spreads when eggs get onto fingers, under fingernails or onto bedding, towels, toys and household surfaces, and are then swallowed. Anyone can be affected, although threadworms are particularly common in children and can pass quickly between household members.

Symptoms people often notice

• Small white worms: they may be visible in the poo or around the anus and can look like short pieces of white thread.
• Itching around the bottom: this is often worse at night when the worms lay their eggs.
• Itching around the vagina: some girls or women may notice irritation in this area.
• Disturbed sleep: itching can cause waking, irritability and difficulty concentrating during the day.
• Irritated skin: repeated scratching may make the skin around the anus sore or broken.
• Less common symptoms: bedwetting, reduced appetite or weight loss can occur and should be mentioned during the consultation.

Can Treherbert Pharmacy help with threadworm treatment?

The NHS Wales Common Ailments Service can usually assess suspected threadworms when worms have been seen or eggs have been detected. The pharmacist will check the age and circumstances of every household member who may need treatment.

Mebendazole may be considered following assessment. It is widely used from 6 months of age, although use in children under 2 is outside the manufacturer’s licence. It is not suitable during pregnancy and may not be suitable for everyone. The pharmacist will explain the safest option and will not supply treatment unless it is clinically appropriate.

What happens during your consultation?

1. 1
   Confidential assessment. The pharmacist will discuss the symptoms privately and check whether threadworms are the most likely explanation.
2. 2
   Household review. You will be asked who lives in the home, their ages and whether anyone is pregnant, breastfeeding or unable to take treatment.
3. 3
   Suitability checks. The pharmacist will review medical conditions, liver problems, medicines, allergies and previous episodes or treatment.
4. 4
   Treatment and hygiene plan. Where appropriate, the pharmacist may recommend medicine alongside household hygiene measures, or hygiene measures alone when medicine is unsuitable.
5. 5
   Clear follow-up advice. You will be told how long to continue hygiene measures, whether a second dose may be needed and when to seek another clinical review.

Each household member who receives NHS treatment needs an individual Common Ailments consultation record. Please tell the pharmacy team how many people may need assessment when arranging the appointment.

What information may the pharmacist ask about?

• Whether worms have been seen, what they looked like and when they were noticed.
• Whether itching is mainly at night and whether it affects the anus, vagina, sleep or behaviour.
• The age of the affected person and the ages of other people living in the household.
• Whether anyone who may need treatment is pregnant, breastfeeding or has severe or long-term liver disease.
• Previous threadworm episodes, which treatments were used and whether symptoms returned after treatment.
• Any abdominal pain, vomiting, weight loss, urinary symptoms, vaginal symptoms or signs of infected skin that may need a different assessment.

When our pharmacist independent prescriber may be able to help

If symptoms are not covered by the NHS Common Ailments Service, but there are no urgent warning signs, our pharmacist independent prescriber may be able to carry out a broader assessment and advise on the safest next step.

This may be relevant when threadworms keep returning, the diagnosis is uncertain, the patient is very young, symptoms suggest another cause of itching or irritation, or medicine is not suitable. The consultation may result in advice, treatment where clinically appropriate, or referral to a GP or another healthcare service.

Important: independent prescribing does not guarantee that medicine will be prescribed. Pregnancy, repeated infection, significant abdominal symptoms or concern about another diagnosis may still require GP or specialist assessment.

Find out about our independent prescribing service

When you should seek urgent medical help

Threadworms do not usually cause serious illness. Do not rely on a routine pharmacy appointment when symptoms suggest another or more serious condition.

• Seek same-day medical advice through your GP or NHS 111 Wales if there is severe or worsening abdominal pain, repeated vomiting, blood in the poo, marked weight loss, fever or the patient appears very unwell.
• Seek prompt clinical advice if scratching has caused broken skin with spreading redness, swelling, increasing pain, discharge or fever, or if there are significant urinary or vaginal symptoms.
• Call 999 or go to A&E if a medicine causes difficulty breathing, throat tightness, collapse, or swelling of the face, lips, tongue or throat.

How to stop threadworms spreading or coming back

Medicine kills the worms but does not kill their eggs. Household hygiene is therefore an essential part of treatment. Follow the pharmacist’s individual advice.

• Continue hygiene measures for the full period advised: usually 2 weeks when medicine is used, or 6 weeks when hygiene measures are used alone.
• On the first day: wash sleepwear, bed linen, towels and soft toys at a hot temperature, vacuum rooms and mattresses, and damp-dust surfaces.
• Every morning: shower or bathe, wash around the anus, and change close-fitting underwear and nightwear.
• Wash hands carefully: use soap and warm water, scrub under nails after using the toilet or changing nappies, and before eating or preparing food.
• Reduce egg transfer: keep nails short, avoid nail biting and finger sucking, do not share towels or flannels, and do not shake bedding or clothes.
• School, nursery and work: people with threadworms do not normally need to stay away, provided the treatment and hygiene advice is followed.

Free NHS advice and treatment

The NHS Wales Common Ailments Service provides a free pharmacist consultation for eligible patients. Any treatment supplied through the service is also free of charge.

• No GP referral is needed: you can book or approach Treherbert Pharmacy directly.
• Assessment comes first: the pharmacist must confirm that threadworms are likely and that the service is suitable.
• Household treatment is coordinated: household members over 6 months are usually considered for treatment at the same time unless it is contraindicated.
• Each person needs an individual record: everyone receiving NHS treatment must have their own Common Ailments consultation recorded.
• Another route may be recommended: this could be independent prescribing, GP care, NHS 111 Wales or urgent care depending on the findings.

Book a threadworm assessment at Treherbert Pharmacy

Book the NHS appointment route for suspected threadworms. You do not need to obtain a GP referral before contacting the pharmacy. Please let the team know if several household members may need assessment.

Book an NHS pharmacy appointment

Choose an NHS appointment if you would like help with this condition. The pharmacist will assess whether treatment is suitable or whether you need another service.

Useful links

• Read about the NHS Common Ailments Service at Treherbert Pharmacy
• View all NHS pharmacy services in Treherbert
• Browse conditions covered by NHS pharmacy services
• Read NHS 111 Wales information about threadworms
• Read the NHS Wales Common Ailments threadworms patient leaflet
• Read Welsh Medicines Advice Service information about the Common Ailments Service

Clinically reviewed by Jon James, Pharmacist Independent Prescriber. Last reviewed: June 2026.