Is Petroleum Jelly Good or Bad for Psoriasis?

Petroleum jelly has a mixed reputation in skincare circles, but for psoriasis specifically, dermatology sources are fairly consistent: it can genuinely help, within certain limits. Here's what the evidence says.

Why Petroleum Jelly Can Help

Petroleum jelly (petrolatum) is what's known as an occlusive moisturizer — it creates a physical barrier on the skin's surface rather than adding water directly. According to research summarized by Medical News Today, this barrier helps seal in existing moisture and prevent transepidermal water loss — a process that's already elevated in psoriasis due to impaired skin barrier function. By reducing this water loss, petroleum jelly helps rehydrate the thickened outer layer of skin, making plaques softer and more comfortable.

A 2017 review of psoriasis research noted that emollients like petroleum jelly are considered a backbone of psoriasis therapy — a foundational, low-cost tool used alongside more targeted treatments rather than a replacement for them.

What It Can and Can't Do

Petroleum jelly doesn't address the underlying immune dysfunction driving psoriasis — it's a supportive measure, not a treatment for the condition itself. What it can meaningfully help with:

  • Reducing dryness and the associated itching and discomfort
  • Helping cracked skin heal by locking in moisture and lowering infection risk from open cracks
  • Sealing in other treatments applied underneath it, when used as a top layer over medicated creams

How to Use It

  • Apply to clean, slightly damp skin after bathing to lock in existing moisture
  • Use it as a top layer over prescribed topical medications to boost absorption and effectiveness
  • For scalp use, some people apply it about an hour before washing to help soften scale, though scalp-specific products are often easier to work with and rinse out
  • On hands or feet, apply generously at night and consider cotton gloves or socks over top for deeper overnight hydration

Potential Downsides

Petroleum jelly is very heavy and greasy, which some people find impractical for daytime use, especially on the scalp or under clothing. If you find it too occlusive, lighter alternatives — like specifically formulated psoriasis creams with ceramides or natural oils — can offer similar barrier support with a less greasy feel.

Frequently Asked Questions

Is petroleum jelly safe for daily long-term use?

Generally yes — it's considered hypoallergenic and low-risk for most people, which is part of why it's so commonly recommended by dermatologists as a simple, inexpensive option.

Can petroleum jelly replace a medicated psoriasis cream?

No — it supports moisture retention but doesn't address the immune process behind psoriasis. It works best alongside, not instead of, any prescribed or targeted treatment.

Next Steps

For a lighter-feeling alternative with the same barrier-supporting goal, explore our full psoriasis cream collection.

This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment.

Sources & References

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