Summer eczema: why does my horse rub its mane raw? Triggers, seasonal plan and skin management
A horse that suddenly starts rubbing itself vigorously against posts, trees or stable walls in the spring is often showing more than just an itch. Summer eczema is usually caused by an overreaction of the immune system to insect bites, which can quickly lead to skin irritation getting out of hand. In this article, you’ll learn how to recognise the early signs, which factors exacerbate the symptoms, and how smart skin management can help your horse feel more comfortable.
Please note: The information in this article is intended for general information purposes only and is not a substitute for veterinary advice. Paardenkriebels is not a vet or a medical specialist. In the event of persistent, serious or sudden symptoms, always contact a vet for a professional assessment of your horse.
Why do horses with summer eczema mainly rub their manes and tails?
Horses with summer eczema mainly rub their mane, the base of their tail and their belly, as these areas are particularly sensitive to insect bites. The itching becomes so intense that a horse will continue to rub until the hair breaks off or the skin is damaged.
This reaction doesn’t just happen out of the blue. In many horses, the immune system reacts excessively to the saliva of small biting insects such as midges. As soon as the season begins and the temperature rises, the symptoms often increase rapidly. At first, you’ll notice loose flakes or a few broken hairs. Later, bald patches, scabs and thickened skin develop.
The itching causes discomfort. Some horses become irritable whilst being ridden or are less keen to be touched around the neck and tail. Other horses, on the other hand, rub themselves obsessively as soon as they come to a standstill. This constant rubbing damages the skin barrier, causing the irritation to persist for even longer.
On the page about Summer eczema and the immune system You can read more about the role of the immune system in these skin reactions.
What triggers make summer itchiness worse?
Insects are a well-known trigger, but they are not the whole story. Diet, stress, skin irritation and weather conditions often play a part in determining how strongly a horse reacts.
Humid, windless evenings in particular lead to increased midge activity. Horses kept close to still water or sheltered woodland edges are therefore more likely to suffer from skin irritation. A thick winter coat that is slowly shedding can also make the skin more sensitive in spring.
Diet plays an indirect role. A horse whose body is under excessive strain or which has sensitive gut flora seems to develop skin reactions more quickly. This is often seen in horses that are fed rich grass, get little exercise or are already prone to other skin problems.
Stress and skin reactions reinforce each other
Stress often increases the skin’s sensitivity. A horse that sleeps poorly due to itching becomes tense more quickly and rubs itself more. Conversely, stress in turn causes further distress in the body. This pattern is often seen in horses that struggle to recover from skin conditions in the summer.
Changes in management also play a part. A move, a change of herd or a different feed ration can put just enough strain on the animals to make any symptoms more apparent.
How can you recognise the early signs of summer eczema?
You can often recognise the onset of summer eczema by subtle changes in behaviour and skin condition. Many horses first show signs of mild itching before bald patches appear.
A horse may shake its head more frequently, rub briefly against a fence or suddenly bite the rider’s flank. Small broken hairs may appear in the mane. Sometimes the skin feels warmer or you may see dry flakes along the mane.
It is precisely those early signs that make all the difference. Anyone who only takes action once most of the hair has fallen out is already playing catch-up. By then, the skin has already been under strain for weeks.
Minor skin damage can quickly get worse
Damaged skin is less effective at protecting against moisture, dirt and insects. This means scabs or weeping sores are more likely to develop. The irritation can spread very quickly, particularly in warm weather.
Many horse owners tend to use a mix of different products at this stage. That might seem logical, but skin that is under too much strain often reacts more calmly to a simple and consistent approach. Soothing the skin starts with reducing irritants.
If the symptoms persist or if sores, swelling or severe skin reactions develop, please contact a vet.
A seasonal plan prevents you from being caught out
Horses with recurring itching will benefit from a plan that starts before the insect season begins. Waiting until the rubbing starts makes it harder to keep the skin calm.
Many owners only start protecting their pets in May or June. By that time, the immune system has often already been activated. It is precisely the transition from winter to spring that determines how severe the season will be.
A good seasonal plan involves more than just putting a blanket on. It’s all about timing, the environment and daily care. Horses that receive support early on often maintain stable skin condition for longer.
In spring, it helps to plan grazing times carefully. Midges are particularly active around sunrise and sunset. Some horses are calmer when they are out during the day and go into the stable in the evening.
Fresh air and exercise also help the body cope better with exertion. A horse that is constantly sweating under an ill-fitting rug actually experiences additional skin stress. You should therefore check regularly to ensure that the skin remains dry and supple.
What role does skin care play in summer eczema?
Effective skin care is all about protecting and restoring the skin barrier. The calmer the skin remains, the less likely a horse is to keep rubbing itself.
It all starts with daily observation. Does the skin feel warm to the touch? Can you see any flaking or the beginnings of scabs? By spotting small changes early on, you can often prevent more serious problems.
Clean the skin gently and not too often. Irritated skin is more easily thrown out of balance by harsh shampoos or excessive washing. Many horses respond better to a gentle approach, where dirt is carefully removed without drying out the skin.
Hydration also plays a part. Dry skin cracks more easily and causes extra itching. Products designed to support the skin barrier can help keep the skin supple during the warmer months.
On the page with products for summer eczema in horses You’ll find skincare products that are suitable for sensitive skin.
Why do some horses react more strongly than others?
Not every horse reacts in the same way to insect bites. Sensitivity depends on heredity, immunity, the environment and general health.
Icelandic horses, Friesians and hardy breeds are relatively prone to skin reactions in the summer. That does not mean that other horses do not experience any problems. Sport horses and ponies, too, can suddenly become sensitive following a stressful period or a change in diet.
Age can sometimes be a factor. Young horses often only start showing symptoms after a few seasons of exposure to insects. Older horses, on the other hand, may become more susceptible as their immune system changes.
The severity of the symptoms varies greatly. Some horses only experience mild itching around the tail. Other horses rub their entire mane until it is raw within a few days. That is why a standard approach does not always work.
So don’t just look at the visible areas. Behaviour, resilience and skin condition often reveal more than the bald patches themselves.
Tackling summer eczema starts with taking a closer look at the skin
Summer eczema requires more than just treating the symptoms. The sooner you recognise the signs and support your horse’s skin, the greater the chance that your horse will get through the season more comfortably.
By starting as early as spring with preventative measures, smart management and targeted skin care, you can often prevent problems from getting completely out of hand. Small adjustments to grazing, grooming and skin care can make a big difference to how a horse feels.
Would you like to understand better what’s causing the itching, or are you looking for products suitable for sensitive skin care? Then take a look at the information on Summer eczema and the immune system and discover our range products for summer eczema from Horse jitters. If the symptoms remain severe or if you are unsure of the cause of the skin problems, have your horse examined by a vet.