Sunburn is more than just a temporary inconvenience – it can lead to itching, peeling, blistering, and long-term skin damage if not properly managed. As we spend more time outdoors in the sun, especially during warmer months, protecting and repairing our skin becomes increasingly important. While prevention is best, such as using sunblock and staying in the shade, many people seek natural remedies to ease discomfort when sunburn occurs. Natural oils have long been used in skincare, and one that’s gaining attention for its soothing potential is castor oil. But does it really help after sunburn?
Note: Before considering any herbal remedies, we recommend speaking to a registered herbalist first. Book a consultation at Napiers to receive personalised guidance based on your individual health profile.
How Does Castor Oil Help With Sunburn?
Castor oil is a thick, nourishing oil derived from the seeds of the Ricinus communis plant. It has been used for centuries in traditional skincare, primarily due to its anti-inflammatory and antioxidant properties. These characteristics suggest it may help calm irritated skin, support repair processes, and reduce discomfort after a long day in the sun[1]. While it's not a substitute for sunscreen or medical treatment, it can potentially complement your after-sun routine. Due to its resurgence in skincare, castor oil warrants further research to fully understand its potential benefits for sun-exposed skin.
Napiers Organic Castor Oil
This pure, organic, cold-pressed castor oil is free from artificial chemicals, fragrance, preservatives, PEGs, phthalates, and petrochemicals. This makes it a gentle addition to your skincare routine when your skin feels tight, itchy, or tender after sun exposure.
How Does Castor Oil Work on Sun-Exposed Skin?
Sunburn disrupts your skin’s protective barrier, leading to dehydration and inflammation. Applying castor oil may provide the following benefits:
- Moisturising: Castor oil is rich in ricinoleic acid, a fatty acid known for its emollient qualities. It helps trap moisture, easing dryness and rough texture.
- Soothing effect: Its thick consistency can act like a gentle barrier, reducing irritation from clothing and environmental pollutants.
- Anti-inflammatory properties: Castor oil may help reduce redness and calm the skin as it recovers from UV damage.
When and How to Use Castor Oil for Sunburn
Here’s how to integrate castor oil into your sun care regime:
- Do a patch test first and apply only a thin layer to check for any irritation or skin reactions.
- Clean the skin: Use cool water and a gentle cleanser to remove salt, sand, or sweat that has built up during your day in the sun.
- Pat dry: Avoid rubbing to prevent further irritation.
- Apply a small amount of castor oil: Focus on dry, tight, or peeling areas. You can use your fingertips or a cotton pad.
- Use at night: Let the oil absorb overnight for maximum hydration while your skin regenerates.
Castor oil is best used in the early recovery stages, once initial heat and redness have started to subside. It may be helpful in easing itching after sunburn, reducing the likelihood of scratching. For mild burns or redness, applying a thin layer of castor oil after cleansing can form part of an effective after sun care regime. However, it should not be used on open wounds or severe blisters. If you're unsure, consult a healthcare provider or licensed herbalist.
According to NHS guidelines, staying hydrated, taking cool showers, keeping sunburnt skin from direct sunlight, and using soothing lotions are recommended for sunburn[2]. Natural oils like castor may support those efforts when used correctly.
Alternative Aftersun - Napiers Aloe Vera and Seaweed Gel
Castor oil is an option for those with sun-exposed skin, but might not always be applicable for everyone. For example, if you are someone that gets prickly heat, a thick oil like castor oil would not be advised. For those looking for a natural cooling and soothing gel for post-sun exposure, we recommend our aloe vera and seaweed gel. It's lightweight and more purpose built. It's also great for those looking for a fragrance-free aftersun for the face, which many aftersun products typically do.
FAQs
Is castor oil safe to use on sunburn blisters?
No. Avoid applying castor oil on broken or blistered skin. Wait until the skin begins healing before applying oil.
When is the best time to use castor oil after sun exposure?
After a cool shower and once the skin is clean and intact, preferably in the evening. This allows the oil to absorb overnight and aid skin recovery.
What’s the difference between Napiers castor oil and other after sun treatments?
Unlike commercial lotions that may contain alcohol or synthetic ingredients, Napiers castor oil is organic, unrefined, and free from common irritants. It offers gentle support for dry, inflamed skin.
Does castor oil prevent peeling?
It can help minimise peeling by maintaining moisture and softening flaky skin, but it won't prevent it completely. Consistent hydration and gentle care are key.
References
- Healthline. Can You Use Castor Oil On Your Face? Healthline.
- NHS. Sunburn. NHS.

