Ingredient Guide
Petrolatum, dimethicone and mineral oil are useful occlusives; glycerin supports hydration. Urea can soften thick heel skin but may sting an open fissure.
Start here.
- Humectants attract water; emollients soften; occlusives reduce evaporation.
- Condition-specific context changes the choice: A crack may come from simple dryness, friction or handwashing, but eczema, psoriasis, fungal infection and pressure-related heel problems can look similar.
- Avoidable irritation matters: Avoid picking, blades, aggressive files and strong acids on open cracks. Adhesives and essential oils can also irritate compromised skin.
The three basic moisturiser jobs
Humectants such as glycerin attract water into the outer layer. Emollients smooth gaps between surface cells. Occlusives such as petrolatum reduce evaporation.
For cracked skin, the balance matters more than one ingredient in isolation. Petrolatum, dimethicone and mineral oil are useful occlusives; glycerin supports hydration. Urea can soften thick heel skin but may sting an open fissure.
- Humectants: glycerin and hyaluronic acid
- Emollients and barrier lipids: fatty alcohols, squalane and ceramides
- Occlusives: petrolatum, mineral oil and dimethicone
When an active ingredient changes the brief
An exfoliating or treatment-led ingredient is not simply a stronger moisturiser. Avoid picking, blades, aggressive files and strong acids on open cracks. Adhesives and essential oils can also irritate compromised skin.
Check concentration, application site and frequency. Stop when an active causes persistent burning, rawness or worsening redness.
Fragrance-free, unscented and hypoallergenic
Fragrance-free is generally more useful than unscented for reactive or inflamed skin because unscented products may contain masking fragrance.
Hypoallergenic is not a guarantee. Personal history, patch testing and a stable routine provide more useful evidence.
Turn the label into a shortlist
Start with body area, dryness level and desired finish, then look for a coherent formula. Clean gently, pat dry, apply a thick fragrance-free cream or ointment and protect the area from the activity that keeps reopening it. Do not seal visibly infected or deep wounds without professional advice.
Reject any candidate that conflicts with this safety context: Promptly seek care for deep or spreading cracks, redness, warmth, pus, increasing pain, fever, poor circulation or diabetes-related foot damage.
Common questions,
carefully answered.
What is the best single ingredient for cracked skin?+
There is no universal winner. A balanced, tolerated formula and appropriate texture matter more than a single highlighted ingredient.
Does fragrance-free mean a product cannot irritate?+
No. It removes one common source of exposure, but preservatives, botanicals and other ingredients can still cause individual reactions.
Are natural oils enough?+
An oil can reduce water loss and soften skin, but it does not add water. Many people get more complete support from a balanced cream or an oil layered over damp moisturised skin.
How this guide was prepared
This educational guide uses authoritative dermatology and health information. It does not diagnose a condition or replace personalised medical advice.
Published 15 January 2025. Last updated 23 June 2026. Product recommendations describe moisturising roles, not treatment outcomes.