Hedgehog Ragged Ears and Crusty Skin: Ringworm, Mites and Dry Skin Compared

Quick answer

Ragged, crusty ear edges and flaking skin are one of the most common reasons an African pygmy hedgehog is brought to a vet, and the three usual causes look almost identical from across the room.

Ringworm, mites and simple dry skin all produce flaking, quill loss and scalloped ear margins. They are treated completely differently, two of them are contagious to the other animals in the house, and one of them is contagious to you. Guessing is not a reasonable strategy here.

A soft brush is used to work bath water down through the spines to the skin, never to strip or thin them.

• Crusty, notched or thickened ear margins are a skin disease sign, not a cosmetic one.
• The hedgehog ringworm fungus readily infects people, especially children and anyone handling the animal frequently.
• A glowing lamp test does not rule out ringworm in hedgehogs. Culture or PCR does.
• Mites and ringworm frequently occur together, so finding one does not exclude the other.
• Over-bathing and dry heated air cause a great deal of hedgehog skin flaking that owners treat as disease.

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Do not put tea tree oil, essential oils, human antifungal creams, or mite sprays sold for birds or reptiles onto a hedgehog.

Hedgehogs self-anoint. When they encounter a new smell or taste they lick and chew at it, produce large volumes of frothy saliva, and then deliberately spread that saliva across their own spines and skin with the tongue. Anything you apply to the coat therefore ends up in the mouth and then over the whole body. Tea tree oil in particular is toxic to small mammals, and concentrated parasiticides formulated for other species have caused deaths in hedgehogs. Every topical product goes on under veterinary direction or not at all.
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Decide in 60 seconds

Why the ears show it first

The ear of an African pygmy hedgehog is a thin flap with little insulation, poor blood supply at the very edge, and no protective quills. It is also the part of the body the animal cannot easily reach to groom.

That combination means the ear margin is where a systemic skin problem becomes visible earliest. Fungal invasion of the surface keratin makes the edge thicken and crust. Mite feeding and the scratching it provokes produce scabs and notching. Chronic dryness makes the edge brittle so that small tears appear and never quite heal, and repeated damage leaves a scalloped, moth-eaten outline that persists even after the cause is treated.

Underneath all three, the mechanism is the same. The skin barrier is a layer of overlapping dead cells held in a lipid matrix. Fungi digest the keratin in that layer. Mites tunnel and feed within it. Dry air pulls water out of it. Once the barrier fails, the skin loses more water, becomes itchier, and lets in the bacteria that turn flaking into crusting.

Quill loss follows because each quill sits in a follicle in that same skin. Inflamed, infected or dried-out follicles lose their grip, and quills that should be firmly anchored come out on the bedding, on your sleeve and in the bath water.

Telling the three apart

Ringworm.

Usually caused in hedgehogs by a fungus adapted to this species, and it is the diagnosis you must actively exclude rather than assume away. Typical picture: crusty, thickened skin at the ear margins and around the face, patchy quill loss with dry scaling underneath, sometimes surprisingly little itch. Some hedgehogs carry it and show almost nothing while still infecting people.

The critical point is diagnosis. An ultraviolet lamp examination is often used as a quick screen, but the fungus most associated with hedgehogs does not usually fluoresce, so a dark result is not a negative result. Fungal culture or PCR from plucked quills and crust is what settles it, and culture takes time, so treatment often starts before the answer arrives.

Mites.

Typically produce heavy, obvious flaking that looks like dandruff caught in the base of the quills, quills that lift out easily, restlessness, scratching against cage furniture, and crusting around the ears, face and along the back. Diagnosed on a skin scrape, tape strip or examination of shed material under a microscope.

Mites and ringworm coexist often enough that finding mites should not stop the search. Treating the mites and watching the skin fail to improve is a very common sequence.

Dry skin.

The one owners create. Homes heated through winter are extremely dry, and hedgehogs bathed often, or bathed with detergent-based shampoos, lose the surface lipids that hold water in the skin. The picture is even, fine flaking across the back, no crusting, intact ear margins, no significant quill loss and a comfortable animal.

Dry skin is a diagnosis of exclusion in an animal that has any crusting, any bald patches, or any ear margin change.

The other possibilities.

Bacterial infection secondary to any of the above. Fly strike in a hedgehog with damp soiled skin, which is an emergency. Nutritional skin disease in an animal on a poor-quality diet lacking essential fatty acids. And in older hedgehogs, tumours, because this species develops neoplasia at a high rate and a skin mass or a persistent ulcer should be sampled rather than creamed.

A healthy ear has a smooth, even margin and clean skin at the base of the spines. Compare both ears every week in good light.

What healthy hedgehog skin looks like

The ear margin is smooth and even, without notches, thickening or crust. Both ears match.

The skin between the quills, seen by parting them gently with a fingertip on a settled animal, is pale, dry-looking but not flaky, and unbroken. A few loose quills over a week is normal in an adult. Handfuls are not.

The face is clean, with no crusting at the corners of the eyes or the base of the ears, and no bald patches around the muzzle.

Juveniles are a special case. Quilling is the normal replacement of baby spines with adult ones over the first months, and it produces loose quills, visible pinpricks of new spine emerging, and a sore, defensive animal. The skin underneath should still be clean and unbroken. Quilling plus crusting is not quilling.

Changes that mean act this week

Both ear margins becoming rough, thick or notched.

The classic early ringworm and mite sign. Photograph it against a plain background so you have a reference point.

Quills that pull out with no resistance, or bald patches with visible scale.

Follicular disease. Needs sampling.

Persistent scratching, or a hedgehog rubbing along cage furniture.

Hedgehogs are not usually itchy animals. Deliberate, repeated scratching is a sign.

A change in temperament with no other explanation.

Skin disease is uncomfortable, and a hedgehog that has become balled up, huffy and unwilling to be handled may be sore rather than unfriendly.

Anyone in the house with a new ring-shaped, itchy, inflamed patch.

Most commonly on the hands, forearms or face of whoever handles the hedgehog most. The lesions caused by the hedgehog fungus tend to be more inflamed than typical human ringworm. This confirms the diagnosis in the animal and needs treating in the person.

Any ulcer, lump or thickened plaque in an older animal.

Sample it. Do not treat it empirically for weeks.

Home care that genuinely helps

A shallow warm foot bath, a soft brush and a towel is the entire routine kit. Everything medicated comes from a vet.

Bathe less than you think.

Full baths strip skin lipids. A shallow warm foot bath, deep enough to cover the feet and belly but no deeper, cleans the parts that actually get dirty and leaves the back alone. Reserve full baths for genuine soiling.

Use warm water and, if anything, a product your vet has approved.

Human and dog shampoos are formulated for different skin and different detergent tolerance.

Dry thoroughly and keep the animal warm afterwards.

A damp hedgehog in a cool room loses heat fast, and cold hedgehogs stop eating and attempt hibernation.

Fix the air, not just the animal.

Heated indoor air in winter is very dry. Raising humidity in the room where the enclosure sits, keeping the enclosure away from radiators and heat vents, and maintaining a stable warm temperature all reduce flaking without any product at all.

Look at the diet.

Skin quality depends on protein quality and on essential fatty acids. A hedgehog on a poor-quality food, or one whose diet is largely mealworms, will have worse skin regardless of what you put on it.

Handle with hygiene in mind.

Wash hands before and after, keep the enclosure out of food preparation areas, do not let children handle a hedgehog with any skin lesion until it has been diagnosed, and do not press a hedgehog against your face or neck.

What never to do

Do not use a mite spray sold for birds, reptiles or small rodents. Species dosing differs and hedgehogs have been killed by improvised parasiticides.

Do not apply any essential oil, including tea tree, lavender or eucalyptus.

Do not use a human antifungal cream. It will be licked, self-anointed and swallowed, and it will not clear a deep follicular infection.

Do not accept a lamp examination as proof there is no ringworm.

Do not bathe a flaking hedgehog repeatedly in the hope of washing the problem away. More bathing makes dry skin worse and does not clear either mites or fungus.

Do not stop treatment when the skin looks better. Fungal and mite treatments run to a defined endpoint, usually confirmed by repeat testing, and stopping early is the most common cause of relapse.

Do not handle a hedgehog with undiagnosed skin lesions and then handle another pet or a young child without washing.

When to get help

Book an appointment within a few days for crusty or notched ear margins, patchy quill loss, heavy flaking, visible scratching, or any change in the skin between the spines.

Book sooner if a person in the household develops a rash, if the hedgehog has stopped eating, or if there are raw or bleeding areas.

Go the same day for fly strike, open wounds, or a hedgehog that is cold, unresponsive or refusing to uncurl at all.

Have any lump, ulcer or persistent thickened patch in an older hedgehog sampled rather than treated blind.

A settled hedgehog with smooth ear margins and firmly seated quills is the endpoint, and it takes weeks rather than days to get there.

Bring dated photographs of both ears and any bald areas, the age of the hedgehog, the exact diet, the bedding and hide materials, how often you bathe and with what, the room temperature and humidity, whether other animals or people in the house have skin problems, and any product you have already applied. Expect skin scrapes, tape strips and plucked quills for fungal culture or PCR, and expect the vet to want to treat the enclosure as well as the animal.