Fingertip Unit (FTU) Dosing in Eczema: How Much Steroid Cream to Use

In eczema management, topical corticosteroids are commonly prescribed with instructions such as “apply a thin layer” to affected areas.

While this sounds simple, in practice it is one of the least precise and most commonly misunderstood instructions patients receive.

A key reason for treatment failure is not always the medication itself — but uncertainty around how much to actually use.

This is where Fingertip Unit (FTU) dosing becomes clinically relevant.

Why “a thin layer” is not enough

The phrase “apply a thin layer” is open to interpretation.

For some patients, it may mean barely visible amounts of cream. For others, it may mean covering the entire area until it feels moisturised.

Neither interpretation is necessarily correct.

This variability can lead to:

• Under-treatment of inflammation

• Prolonged eczema flares

• Frustration when treatment appears ineffective

• Repeated escalation between mild and severe disease states

In many cases, patients are trying to be cautious — not non-compliant.

What is a Fingertip Unit (FTU)?

Fingertip Unit (FTU) Dosing

A Fingertip Unit is a practical method used to estimate how much topical treatment should be applied.

One FTU is the amount of cream or ointment squeezed from a standard tube, from the tip of an adult index finger to the first crease.

This amount is generally enough to cover an area of skin approximately twice the size of an adult palm (including fingers).

Why FTU improves treatment outcomes

FTU dosing helps to remove guesswork from topical treatment.

It supports:

• More consistent application

• Improved treatment effectiveness

• Reduced fear of overuse

• Better alignment between prescribing and real-world use

When patients understand how much to use, treatment becomes more predictable and less anxiety-driven.

The gap in routine counselling

Despite its usefulness, FTU dosing is not always demonstrated in practice.

Patients may leave a consultation with a prescription, but without ever being shown what the correct amount looks like in real life.

This creates a gap between prescribing intent and actual use.

Beyond dosing: confidence matters

FTU is not only about quantity.

It also addresses confidence.

Patients who are unsure about how much to apply may:

• underuse treatment to “play it safe”

• stop early once improvement is seen

• avoid using prescribed strengths altogether

Clear demonstration and reassurance can significantly improve adherence and outcomes.

Reflection

When eczema treatment does not seem to work, one important question to consider is:

Is the medication ineffective — or is it simply not being used in the right amount?

Small practical details, such as FTU education, often make a meaningful difference in long-term eczema control.