Can Horses Get Sweet Itch In The Winter?

Sweet itch is typically associated with the warmer months of the year when biting insects are more prevalent. However, some horses may experience sweet itch symptoms during the winter months.

While the risk of sweet itch is generally lower in the winter due to reduced insect activity, horses that live in areas with mild winters or are stabled in heated barns may still be exposed to biting insects. Additionally, some horses may develop sweet itch due to other allergens or irritants present in their environment, such as mold or dust.

It’s important to note that not all horses with sweet itch will experience symptoms year-round, and the severity of symptoms may vary depending on the individual horse and their environment. Some horses may experience only mild itching or skin irritation during the winter, while others may experience more severe symptoms.

If you suspect that your horse may be experiencing sweet itch or other skin issues during the winter months, it’s important to consult with your veterinarian. Your veterinarian can help to identify the underlying cause of your horse’s symptoms and recommend an appropriate management plan, which may include fly control, environmental management, and topical or oral medications to manage itching and inflammation.

Here are some tips for managing sweet itch in the winter:

Maintain a clean and dry environment

Sweet itch can be aggravated by moisture and dirt, so it’s important to keep your horse’s living area clean and dry. Remove any wet bedding or manure promptly, and consider using shavings or other dry bedding materials.

Use fly repellent

Even in the winter, there may still be biting insects that can aggravate sweet itch. Use a fly repellent spray or wipe on your horse to help keep biting insects at bay.

Dress your horse appropriately

In colder weather, it’s important to dress your horse appropriately to keep them warm and comfortable. However, it’s also important to choose blankets and other clothing items that won’t aggravate sweet itch. Look for breathable materials that won’t trap moisture against your horse’s skin.

Manage your horse’s diet

Some studies have suggested that sweet itch may be linked to certain dietary factors, such as high sugar and starch intake. Talk to your veterinarian about your horse’s diet and whether any changes could help to manage sweet itch symptoms.

Consider topical treatments

If your horse is experiencing itching or skin irritation due to sweet itch, there are a variety of topical treatments that may help. These can include medicated shampoos, creams, or sprays that contain soothing ingredients like aloe vera or oatmeal.

Work with your veterinarian

If your horse is experiencing sweet itch symptoms during the winter, it’s important to work closely with your veterinarian to develop an appropriate management plan. Your veterinarian may recommend additional treatments or medications to help manage your horse’s symptoms.


Overall, managing sweet itch in the winter requires a multifaceted approach that takes into account your horse’s environment, diet, and overall health. By working closely with your veterinarian and taking steps to minimize exposure to biting insects and other irritants, you can help keep your horse comfortable and healthy throughout the winter months.

At What Age Does A Horse Get Sweet Itch?

Although sweet itch can affect horses of any age, the onset of symptoms typically occurs in horses that are between 2-4 years old, although it can develop at any age. There are several factors that contribute to the development of sweet itch in horses, including genetics, environment, and immune system function.

Genetics

Research has shown that sweet itch has a genetic component, and certain breeds are more predisposed to the condition than others. Breeds such as the Icelandic horse, Shetland pony, and Highland pony are known to have a higher incidence of sweet itch than other breeds.

In addition to breed, certain bloodlines within breeds may also be more susceptible to sweet itch. Horses with a family history of the condition are more likely to develop it themselves, highlighting the importance of considering a horse’s genetic background when assessing the risk of sweet itch.

Environmental Factors

While genetics plays a role in the development of sweet itch, environmental factors also contribute to the condition. The prevalence of biting insects, such as midges, mosquitoes, and black flies, can vary depending on the region and time of year. In areas where biting insects are particularly abundant, horses are more likely to be exposed to the allergens in their saliva, which can trigger an allergic reaction.

In addition to the presence of biting insects, environmental factors such as humidity, temperature, and rainfall can also impact the development of sweet itch. Research has shown that horses living in areas with high humidity and rainfall are more likely to develop the condition, potentially due to the increased number of biting insects that thrive in these conditions.

Immune System Function

The immune system plays a critical role in the development of sweet itch in horses. When a horse is exposed to the allergens in the saliva of biting insects, their immune system overreacts and produces an excessive inflammatory response. This response leads to the release of histamines and other inflammatory molecules, which cause the characteristic itching, hair loss, and skin lesions associated with sweet itch.

Research has shown that horses with weakened immune systems may be more susceptible to developing sweet itch, as their bodies are less able to mount an effective defense against the allergens in biting insect saliva.

What To Feed A Horse With Sweet Itch?

There is no one specific diet that is recommended for horses with sweet itch, as the condition is caused by an allergic reaction to the saliva of biting midges rather than a dietary issue. However, some dietary changes may help to support a horse’s overall health and immune function, which can help to reduce the severity of allergic reactions and other skin issues.

Here are some dietary tips that may be helpful for horses with sweet itch:

Provide a balanced diet

Ensure that your horse is receiving a balanced diet that meets their nutritional needs, including adequate protein, vitamins, and minerals.

Avoid high-sugar feeds

Horses with sweet itch may be more prone to insulin resistance and other metabolic issues, so it’s important to avoid feeding high-sugar feeds such as grains or sweet feeds.

Offer plenty of forage

Providing plenty of high-quality hay or pasture can help to support a horse’s digestive health and may help to reduce inflammation and other skin issues.

Consider supplements

Some supplements, such as omega-3 fatty acids, vitamin E, and probiotics, may help to support a horse’s immune function and overall health.

Consult with a veterinarian

If you have concerns about your horse’s diet or overall health, it’s always a good idea to consult with a veterinarian or equine nutritionist for personalized advice.


It’s important to note that while dietary changes may be helpful for supporting a horse’s overall health, they are not a substitute for other management strategies such as environmental modifications, topical treatments, and the use of specialized rugs or blankets.

If you suspect that your horse has sweet itch, it’s important to work with a veterinarian or equine dermatologist to develop a comprehensive management plan that addresses all aspects of the condition.