What Is Fucidin Cream Used For? Guide to Uses & Application

If you’ve noticed crusty, reddish patches on your child’s skin — or your own — that seem to spread quickly, you’re probably wondering what’s going on and how to stop it. Impetigo is one of those common skin infections that tends to crop up unexpectedly, and Fucidin cream is one of the most frequently prescribed treatments for it in the UK. Based on official NHS guidance and package leaflets, here’s what you actually need to know before using it.

Active ingredient: Fusidic acid 20 mg/g · Primary uses: Bacterial skin infections like impetigo · Typical duration: 1-2 weeks · Prescription status: Prescription-only · Common bacteria targeted: Staphylococcus aureus

What skin infections does Fucidin treat?

Fucidin cream is a topical antibiotic designed specifically for bacterial skin infections. The NHS states that Fucidin cream is used to treat conditions where the skin is infected by germs (bacteria), such as impetigo.

Impetigo

Impetigo is the most common condition treated with Fucidin cream. It is a highly contagious bacterial skin infection often presenting as crusty, reddish patches or blisters, typically around the nose and mouth. According to the NHS, impetigo is frequently treated with topical antibiotics like Fucidin cream as a first-line option for mild cases.

The treatment is effective against Staphylococcus aureus, the primary cause of impetigo. The BNF (British National Formulary) confirms that fusidic acid is effective against most staphylococcal infections.

Infected eczema and dermatitis

Fucidin is also used when inflammatory skin conditions like eczema become secondarily infected with bacteria. The MHRA (Medicines and Healthcare products Regulatory Agency) issued a warning in October 2020 about using fusidic acid in atopic dermatitis due to resistance concerns — resistance to fusidic acid has been reported in up to 5% of S. aureus isolates in the UK.

For widespread impetigo, oral antibiotics may be preferred over topical Fucidin according to NHS guidance.

How long does Fucidin cream take to work?

Understanding the timeline helps you know whether treatment is working or whether you need to seek further medical advice.

Typical treatment duration

The NHS recommends applying Fucidin cream three times daily for 7–10 days. The BNF lists fusidic acid or mupirocin as first-line topical options for impetigo. According to official NHS guidance, apply fusidic acid cream or ointment thinly 3 or 4 times a day for 7 to 10 days.

When to expect improvement

Improvement is usually seen within 48 hours of starting Fucidin for impetigo, according to NHS sources. However, it’s important to continue treatment for the full course even if symptoms improve to prevent resistance.

The implication: if you’re not seeing any improvement after two days, contact your GP — the infection may be resistant to fusidic acid or require oral antibiotics.

Where do you put Fucidin ointment?

Proper application technique matters — using it wrong can reduce effectiveness or increase side effects.

Application instructions

The NHS provides clear instructions: apply Fucidin cream thinly to clean, dry affected skin, using clean fingers or an applicator, three times a day. Wash hands before and after applying Fucidin to avoid spreading infection.

According to SPS NHS guidance, Fucidin ointment is preferred over cream for dry lesions, while cream is better for moist lesions — both contain 2% fusidic acid.

How much to apply

A thin layer is sufficient — more isn’t better. Do not cover the treated area with airtight dressings unless specifically advised by your doctor or pharmacist. Children should use the same application method as adults, but parents should consult a GP for children under 1 year old.

Where not to use Fucidin cream?

Fucidin isn’t a general-purpose skin cream — there are specific areas and situations where it should be avoided.

Avoid eyes and mucous membranes

The NHS advises not to use Fucidin on eyes, nose, mouth, or open wounds unless specifically directed by a healthcare professional. Patient.info lists hypersensitivity (allergy to fusidic acid) as a contraindication for Fucidin.

Not for viral or fungal infections

Fucidin is an antibiotic — it only works against bacteria. It will not treat viral infections like cold sores or fungal infections like athlete’s foot. The research notes indicate that effectiveness for fungal infections is unclear and generally not supported.

Additionally, topical Fucidin monotherapy is not recommended if MRSA (Methicillin-resistant Staphylococcus aureus) is suspected, according to BNF guidance. In such cases, alternative antibiotics would be required.

The catch: patients sometimes use Fucidin for conditions it wasn’t designed for (like acne or pimples), which drives unnecessary resistance and delays appropriate treatment.

What are common Fucidin cream side effects?

Like all medicines, Fucidin can cause side effects — though most people tolerate it well.

Skin irritation

The NHS lists common side effects of Fucidin cream as mild irritation, redness, or itching at the application site. Patient leaflets report a burning sensation in 1–10% of users, according to the Medicines.org.uk Patient Information Leaflet.

Rare allergic reactions

Rare but serious side effects include allergic reactions like rash, swelling, or difficulty breathing. The MHRA warned in 2020 of rare severe skin reactions with fusidic acid, including DRESS syndrome (Drug Reaction with Eosinophilia and Systemic Symptoms). If you experience any severe reaction, seek immediate medical help.

Pregnancy category requires careful consideration: use only if benefit outweighs risk per NHS guidance. Always discuss any medications with your doctor or pharmacist if you are pregnant or breastfeeding.

How to apply Fucidin cream step by step

1. Wash your hands thoroughly with soap and water before handling the cream.
2. Clean and dry the affected area gently with clean water and pat dry.
3. Squeeze a small amount of Fucidin cream onto your fingertip — a pea-sized amount is usually enough for a patch the size of your hand.
4. Apply a thin layer to the affected skin only, rubbing it in gently.
5. Wash your hands again after application to prevent spreading the infection.
6. Repeat this process 3 times daily, or as directed by your doctor or pharmacist.
7. Complete the full course of 7–10 days even if symptoms improve earlier.

Facts you can trust vs. things that are unclear

Not everything you’ll read about Fucidin is equally well-supported by evidence. Here’s a practical breakdown:

“Apply fusidic acid cream or ointment thinly 3 or 4 times a day for 7 to 10 days.”

— NHS.uk (National Health Service)

“Fusidic acid is effective against most staphylococcal infections.”

— BNF NICE (British National Formulary)

The pattern across these authoritative sources is consistent: Fucidin works well for staphylococcal skin infections when used correctly, but its effectiveness depends on completing the full course and avoiding inappropriate use for viral or fungal conditions.

Related reading: Pharmacy First Scheme · How to Get Rid of Gum Disease

Fucidin cream primarily treats impetigo and infected eczema with fusidic acid, just as outlined in this impetigo and eczema guide from Weekly Review.

Frequently asked questions