- Best for
- Choosing care for dry or rough skin
- Routine place
- After washing or bathing, on the area named in the product directions
- Frequency
- 5% and 10%: once or twice daily. 20%: twice daily until skin feels soft. Foot gel: morning and night.
- Keep in mind
- Keep high strengths off the face and all urea products off broken or irritated skin
Choose your urea cream strength by area: 5% cream for face, neck and hands; 10% lotion for dry body skin. Use 20% cream for rough heels, elbows, knees and other rough spots, and 30% gel for localized thick, rough foot skin. Higher strengths are not meant for the face.
Key points
- Choose care for dryness or thick, rough skin by the area named on the product.
- Cleanse and pat skin dry before applying; dry feet thoroughly before the foot gel.
- Stop and ask for advice if burning, rash or swelling continues.
- The study charts show averages, not a result everyone reached.
Urea cream strength: moisture or rough-skin care?
Urea helps the outer skin hold water and softens its dry, built-up surface. Lava Derm urea creams use it to help retain moisture and soften dry, rough patches.
One review treats up to 10% urea as mainly moisturizing and above 10% as more softening. Other reviews draw the line in different places, so read 10% as a rough guide, not a switch.
The American Academy of Dermatology (AAD) suggests a cream with 10-25% urea or suitable acids for heel care. The 10% product in this range is a lotion. The area and the full formula matter.
What the evidence says in three numbers
- Urea range the AAD suggests for a heel cream
- 10-25%
- Palm vs cheek skin thickness
- 10×
- Visible dryness on day 14, down from 2.5 before use, in a different 10% cream
- 0.25 / 3
How concentration changes the emphasis
Moisturizing and softening overlap, and reviews draw the line differently. The markers show urea strengths, not measured results.
- 5%Face, neck, handsLava Derm Urea 5% Cream
- 10%Arms, legs, bodyLava Derm Urea 10% Lotion
- 20%Rough spotsLava Derm Urea 20% Cream
- 30%Thick foot skinLava Derm Pure-Foot
Palm skin is about 10 times thicker than cheek skin
Average thickness of the outer skin layer, in micrometres (µm). Heels and calluses were not measured, so this cannot choose your strength.
Compare the four products by area
This table follows Lava Derm product directions. For general dry areas that are not thick or rough, the 10% lotion directions include arms, legs, trunk or any dry zone. Choose one product for each area.
| Area | Strength | Product | How often |
|---|---|---|---|
| Face and neck | 5% | Lava Derm Urea 5% Cream | Once or twice daily |
| Hands | 5% | Lava Derm Urea 5% Cream | Once or twice daily |
| Arms, legs and body | 10% | Lava Derm Urea 10% Lotion | Once or twice daily |
| Rough elbows and knees | 20% | Lava Derm Urea 20% Cream | Twice daily until skin feels soft |
| Rough heels | 20% | Lava Derm Urea 20% Cream | Twice daily until skin feels soft |
| Localized thick, rough skin on the feet | 30% | Lava Derm Pure-Foot | Morning and night; can stay on overnight |
What the rest of the formula changes
Ingredients do different jobs: glycerin holds water, petroleum jelly reduces moisture loss and acids loosen rough surfaces. The evidence does not put them in one order from better to worse. Choose by the job you need.
The foot gel also contains salicylic acid, lactic acid and ammonium lactate. Their percentages are not supplied: 30% refers only to urea. Ammonium lactate is a salt related to lactic acid. The gel is a different formula from the 20% cream.
Lotions spread easily over broad areas; creams are generally thicker. The catalog describes the 10% lotion as fast-absorbing and the 20% cream as rich. Gel texture alone does not tell you how gentle a product will be.
Compare ingredient jobs, not winner scores
- Role
- Helps hold water and soften dry surface skin
- Use
- 5% and 10% for moisture, 20% and 30% for rough spots
- Limit
- Higher strengths are not for the face
- Role
- Holds water in the outer skin
- Use
- Everyday moisturizing
- Limit
- The whole formula affects the result
- Role
- Lactic acid can hydrate and exfoliate; salicylic acid loosens built-up surface skin
- Use
- Targeted roughness in a suitable formula
- Limit
- Acid strength and how acidic the formula is affect skin comfort
- Role
- Forms a layer that reduces water loss
- Use
- Plain petroleum jelly is an AAD bedtime heel-care option
- Limit
- Does not loosen rough surface skin like acids
What studies measured, and when
The chart measures visible dryness on arms or legs, not how quickly a heel softens. It follows a different 10% cream used twice daily.
The 20 participants were aged 65-82 and had moderate or severe dry skin. Dryness decreased between visits, but the study does not set a day when a difference will appear.
In another study, 42 women aged 19 to 64 with dry lower legs used a different brand's 10% urea lotion on one leg and its base lotion on the other. Skin moisture readings (a device scale) were higher on the leg with the 10% urea lotion, which also had other moisturizing ingredients, 30 minutes after one use (50.3 vs 45.2) and after 24 hours (36.6 vs 32.3). Both contained glycerol, and neither was a Lava Derm product.
Visible dryness in a different 10% cream study
Visible dryness from 0 (none) to 3 (severe), average of 20 older adults using a different 10% cream twice daily. Lower is better. The first check was on day 7, so earlier change was not measured.
Apply carefully, without adding extra exfoliation
Cleanse and pat skin dry, then apply the 5% cream, 10% lotion or 20% cream. Massage until absorbed. Try a small area before first use on the face or a new area.
Dry feet thoroughly before the gel. Apply a generous layer to localized rough, intact skin and massage until absorbed. Leave it on overnight; rinse residue in the morning if desired. Wash hands afterward.
Do
- Use the frequency in the choice table and the area named in the directions.
- Wear comfortable, well-fitting shoes to reduce repeated heel friction.
- For persistent burning, increasing redness, itching or a rash, stop, rinse gently and ask for advice.
Avoid
- Urea on open, bleeding, oozing or irritated skin, eyelids or eyes.
- The 20% cream or 30% gel on the face, intimate or delicate areas.
- Another strong exfoliant over the 20% cream or foot gel.
- Cutting hard skin yourself or adding scraping to the acid gel.
Four myths that can lead to the wrong choice
These shortcuts overlook the formula and skin condition.
- “Higher is always better.” As strength rises, the balance between moisture and softening changes, but that does not mean better results on every area. Percentage measures content, not performance. Follow the face and foot directions.
- “Wrap my feet in plastic overnight to boost it.” Wrapping is not part of the directions. Leave the gel on overnight and do not add layers.
- “Burning proves it works.” Burning can be a sign of irritation, not faster softening.
- “Urea means urine is added.” Urea in skincare is made synthetically, not taken from urine.
When self-care needs professional advice
Older adults or people with weakened immunity should ask before corn or callus self-care. Ordinary moisturizing of intact skin is different from removing thick skin.
NHS allows gentle use of a pumice stone or foot file for suitable low-risk feet. Do not cut thick skin yourself. If pain, bleeding or discharge appears, seek help promptly.
A simple urea routine
Choose one strength for each area.
- 01
Cleanse
Wash gently with lukewarm water and pat skin dry before applying the product.
- 02
Focus (optional)
On dry feet, use the foot gel on localized thick, rough skin morning and night; leave it on overnight.
Lava Derm Pure-Foot - 03
Seal
For daily moisture, use the 5% cream once or twice daily.
Lava Derm Urea 5% Cream
Questions, answered clearly
Can I use urea cream on my hands every day?
The Lavaderm 5% cream for face, neck and hands can be used once or twice daily on intact skin. For persistent inflammation, a rash or open cracks on the hands, ask a pharmacist or clinician about the cause.
Which urea cream strength is better for heels, 10% or 20%?
The AAD range includes both strengths without establishing a winner. In this range, the 20% cream has heel directions. No verified trial comparing 10% and 20% in the same base formula on heels shows that 20% is twice as fast or effective.
Can I use the 20% cream on my face or intimate area?
No. The 20% cream is for localized rough skin. After laser or another procedure, ask your clinician before applying urea to the affected area.
Is the foot gel only for heels, and should I wrap it overnight?
The directions also cover localized rough or callused areas of intact foot skin. Leave the gel on overnight; rinse residue in the morning if desired. There is no plastic-wrapping step.
How soon will I notice a difference?
In one small study of a different 10% cream used twice daily by 20 older adults, visible dryness was already clearly lower on day 7, and lower again on day 14. The study did not check earlier days, and thick heel skin can respond differently. Results vary.
Can children or pregnant people use these products?
Ask a doctor or pharmacist about the exact product before using it for a child, during pregnancy or while breastfeeding. The 20% cream and foot gel have different formulas; advice about one does not cover the other.
Can I combine urea with another active product?
If the other product is a medicine applied to the skin, ask your clinician before combining them on the same area. Urea can change how much of a medicine enters the skin. Check the full ingredient list of both products.
