Key Aspect Details Photosensitization Basics Adverse skin reaction to sunlight due to photodynamic agents. Affects light-skinned areas; Symptoms: redness, swelling, blisters. Pastern Dermatitis Also called scratches or grease heel; Inflammation typically on lower legs due to moisture, bacteria, or irritants; Can lead to lameness. Photosensitivity & Pastern Dermatitis Connection Photosensitivity may cause vulnerability leading to conditions like pastern dermatitis, especially in wet/muddy conditions. Management Steps Identify and remove photodynamic substance sources (e.g., alsike clover, buckwheat). Protect from UV light by using fly sheets, UV masks. Gentle skin care with antiseptic soap and corticosteroid creams. Consult veterinarian for persistent issues. Prevention Tips Maintain a dry, clean environment. Use barrier creams and protective gear like Silver Whinny socks. Daily Habits & Long-term Strategies Use protective gear and ensure proper environmental adjustments. Regular monitoring and maintenance checks. When to Seek Veterinary Advice Persistent lesions, significant discomfort, systemic issues (appetite loss, swelling). The life of a horse rider is a unique blend of adventure, responsibility, and connection with one of natures most majestic creatures. However, along with the joys of riding comes the duty to manage and maintain the health of your equine companion. Two conditions that can be particularly bothersome (and sometimes confusing) are photosensitization and pastern dermatitis. Understanding Photosensitization: The Basics Photosensitization in horses is a condition where the skin reacts adversely to sunlight due to the presence of photodynamic agents. These agents could be from certain plants or chemicals ingested by the horse. As perplexing as it sounds, when light-skinned areas such as the muzzle, eyes, and legs are exposed to sunlight after such ingestion, severe skin reactions can occur. Symptoms include redness, swelling, and blisters, as witnessed by [Sarah in Texas](https://madbarn.ca/what-causes-photosensitivity-in-horses/). What Is Pastern Dermatitis? Commonly known as scratches or grease heel, pastern dermatitis is an inflammation of the skin typically on the lower legs. This condition arises from moisture, bacteria, or irritants and can be exacerbated in horses with photosensitized skin. It results in moist, crusty skin which, if left untreated, can lead to lameness. The Connection: Photosensitivity and Pastern Dermatitis Photosensitivity can make horses' skins more vulnerable, potentially leading to conditions like pastern dermatitis. This is especially true if the photosensitized skin is exposed to wet or muddy conditions, trapping moisture and causing severe irritation. Practical Management: Steps to Recovery Identify and Remove the Cause Firstly, it's crucial to identify and eliminate the source of the photodynamic substances. Some common culprits include alsike clover, buckwheat, and St. Johns wort. Once identified, remove the horse from these environments and switch to uncontaminated feed and pasture management. Protect from UV Light Immediate action involves minimizing UV exposure. This can be accomplished by stabling your horse during the day and allowing overnight turnout only. Consider utilizing full-body fly sheets and UV-protective masks. These measures are both practical and highly effective, as highlighted in the case of [Mikes mare in Kentucky](https://uk.practicallaw.thomsonreuters.com). Mike found that consistent use of fly sheets greatly aided in his horse's recovery. Gentle Skin Care Routine Gently cleanse the affected areas with mild antiseptic soap, then pat dry completely. Avoid picking any scabs. Instead, apply topical treatments like corticosteroid creams or hydrating lotions to ease discomfort and assist healing. Medications and Veterinary Assistance If the condition doesn't improve with home care, consult your veterinarian. They might prescribe medications such as oral corticosteroids, pain relievers, or antibiotics to control infections. Preventing Pastern Dermatitis in Photosensitive Horses Prevention is often the best form of treatment. Ensure that your horse's environment is dry and clean. It's also beneficial to use barrier creams or specially designed protective gear like Silver Whinny socks to safeguard legs from moisture and UV exposure. What Other Horse Owners Have Learned Lisa from Florida successfully managed her Quarter Horse's condition by diligently cleaning her horse's legs and using zinc-based creams. Her experience, much like others, underscores the importance of consistent care routines. Daily Habits and Long-term Strategies Successful management involves a combination of protective gear, environmental adjustments, and attentive monitoring. Proactive measures like these enhance the overall health and happiness of your horseand reduce the need for vet visits. Regular Maintenance and Vigilance Regular checks for pasture toxic plants, managing moisture in the horse's environment, and ensuring UV protection all contribute towards prevention. Long-term liver support might be necessary for horses with recurring photosensitivity. When to Seek Veterinary Advice Always consult a veterinarian if you observe persistent lesions, significant discomfort, or signs of systemic health issues, such as appetite loss or swelling. Early intervention improves outcomes significantly. Conclusion: Prioritizing Equine Health Prevention and management of photosensitization and pastern dermatitis require vigilance and care. However, by following the steps outlined, supported by real-world success stories, you can help ensure your horse stays healthy and vibrant, fully ready to enjoy all the activities you love. 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