Kentucky Performance Products: Sweet Itch

Kentucky Performance Products has some tips for how to stop sweet itch from driving you and your horses crazy this summer!

Courtesy Kentucky Performance Products

Summer seasonal recurrent dermatitis (SSRD), commonly called sweet itch or summer itch, is caused by an allergic reaction to the saliva of a biting gnat known as the Culicoides midge. Many people refer to them as “no-see-ums.” These bothersome fellows are active from April through October. They live and breed in ponds, marshes, and areas where water is standing and stagnant. Gnats can travel up to half a mile to find a good meal. They tend to be most active during the hours around dawn and dusk.

It takes about 48 to 72 hours after the first gnat bite for your horse to start showing symptoms. The severity of the reaction increases from year to year, as your horse becomes increasingly more sensitivity to the insect’s saliva. Dorsal feeders are the most common gnat; they feed on the skin around the ears, poll, mane, withers, rump, and tail head. Less common are the ventral feeders, who cause problems on the face, chest, and belly.

The symptoms of SSRD are hard to miss. Horses will constantly rub affected areas as a response to the intense itching. In the acute phase (early phase) the skin will become red and inflamed, and devoid of hair. Crusting and weeping sores may be present. In the chronic phase (later phase) the skin will thicken, blacken and become wrinkled. Sparse, course hair may be present. Once winter comes, the area completely heals up.

There are several measures you can take to limit your horse’s exposure to these annoying insects.

  • Install fine mesh screen in your barn to keep the gnats out. (This is not always practical, however.)
  • Circulate the air with ceiling and stall fans to discourage the gnats from hanging around.
  • Keep horses stalled an hour prior to and after dawn and dusk to reduce exposure to the bugs when they are most actively feeding.
  • Keep stables at least a half mile away from marshes and swamps.
  • Ensure pastures are well-drained to reduce stagnant water from collecting.
  • Keep water tanks clean and filled with fresh water.
  • Use insecticides and repellents to kill gnats and keep them off your horse.
  • Use a fly sheet with tail flap and hood to cover vulnerable areas.

The sooner you notice SSRD and start on a program of treatment and prevention the better off your horse will be. A horse can do a lot of damage in a short period of time when they start rubbing manes and tails.

When you first notice symptoms, take immediate action to reduce your horse’s exposure to these nasty gnats by following the recommendations above. Contact your vet and ask him or her about corticosteroid and antihistamine treatments.

Coating the itchy area daily with an oily substance, like baby oil or Skin So Soft, is often beneficial. Midges don’t like the oily film and will avoid it. Be sure to reapply the oil often, as it tends to wear off as the day goes on.

Be careful with preparations that contain eucalyptus oil, citronella oil, tea tree oil, or mineral oil, as they may cause additional skin irritation. Try them somewhere else on your horse first. Watch the area for 24 hours, noting the appearance of any heat or swelling. Don’t use any preparation that causes irritation.

Supplementing with omega-3 fatty acids has been proven to reduce skin inflammation and mitigate allergic response. Fish oils contain the highest level of beneficial omega-3 fatty acids. When adding a fish oil supplement to your horse’s diet, do so slowly. Add a small amount at a time. In the beginning pour the oil on the feed and let it sit for 30 minutes before mixing it in so the smell is less powerful. Most horses will readily eat fish oil once they become accustomed to the new flavor.

Article written by KPP staff.

Copyright (C) 2012 Kentucky Performance Products, LLC.   All rights reserved.

About Kentucky Performance Products, LLC:

The feeling you get when you watch your child ride.


How do you feel when you watch your child ride? Click here to tell us your story, then like our Facebook page to see if your story is shared. The story with the most likes will win a free supplement of their choice.

Deadline to submit your story is 7/15/17. Winner will be announced 7/31/17.

Your stories are why we developed an electrolyte that will keep the horses in your life hydrated and healthy. It is why the horse that matter to you matters to us®.

To learn more about Summer Games® Electrolyte, visit

Leave a Comment


Leave a Comment

Your email address will not be published. Required fields are marked *