Lime, Sun and a Surprising Rash: Phytophotodermatitis After Outdoor Sports
A squeeze of lime at a picnic or post-game barbecue seems harmless. But if certain plant juices stay on skin that is later exposed to ultraviolet light, a distinctive reaction can develop. It is called phytophotodermatitis.
A plant exposure plus UV light
A published review describes a phototoxic reaction caused by contact with plant chemicals followed by UV exposure. Lime is one possible source. The affected areas can follow splashes or streaks and may become painful, blistered or darker afterward. A case report describes a 26-year-old man whose reaction followed lime contact and sunlight; one case cannot predict what will happen to everyone.
| Topic | What the evidence means |
|---|---|
| Before an outdoor game or picnic | Wash citrus juice from skin with soap and water before further sun exposure. |
| Sun protection | Use shade, protective clothing and broad-spectrum sunscreen as directed; sunscreen does not replace washing off plant juice. |
| A new streaky or blistering rash | Tell a clinician about plant or citrus exposure and sun exposure. |
| Severe blistering, significant pain or signs of infection | Seek prompt medical evaluation. |
Not every rash is eczema
Contact allergy, a sunburn, infection and eczema can sometimes enter the same conversation. Timing and the shape of the area may help a clinician, but a photograph alone is not a diagnosis. Avoid scrubbing or applying unadvised products to blistered skin.
For related guidance, see sunburn after outdoor activity and contact-allergy patch testing.
Dr. Arsy Hydration Recovery Moisturizer #003 is a fragrance-free moisturizer for dry, sensitive and eczema-prone skin. Follow the label and your clinician's advice; it is not a sunscreen or treatment for a medical condition.
Sources and further reading
- Review: Phytophotodermatitis in recreational and occupational settings; PubMed.
- Lime-induced phytophotodermatitis: case report; PubMed.
- CDC: Sun safety.
Educational information from Dr. Arsy, not individual medical advice. Cited organizations and researchers do not endorse this product.