Sweet itch, also known as summertime dermatitis, is a common skin irritation in horses caused by an allergic reaction to the bites of certain types of insects. If your horse suffers from sweet itch, you may be looking for natural remedies to help soothe their sensitive skin. Here are some options to consider:

1. Apple cider vinegar: This natural remedy can help to reduce inflammation and provide relief from itching. Mix equal parts water and apple cider vinegar and apply to the affected area using a spray bottle or sponge.
2. Aloe vera: Aloe vera has natural anti-inflammatory properties and can help to soothe and moisturize the skin. Simply apply the gel from a fresh aloe vera plant to the affected area.
3. Oatmeal bath: Oatmeal has natural anti-inflammatory and soothing properties. Mix ground oatmeal with warm water and use it to rinse your horse’s skin to provide relief from itching.
4. Tea tree oil: This essential oil has natural anti-inflammatory and antifungal properties that can help to soothe sweet itch. Dilute a few drops of tea tree oil with a carrier oil and apply to the affected area.

Always test any new remedies on a small patch of skin before applying it to a larger area, and be sure to speak with your veterinarian before using any natural remedies on your horse.