Cats and dogs share most of the same skin troubles — fleas, allergies, mange, yeast, ringworm. Here’s a plain guide to the six most common skin conditions, what causes them, and how each one is recognised.
Why pet skin disease is so common
Dogs and cats live close to the ground, share our homes, and have permeable skin under a coat of fur. They pick up parasites, react to airborne triggers, and develop secondary infections when their skin barrier is compromised. Most skin disease in pets falls into a short list of recognisable categories — and most of those categories trigger one another.
1. Fleas
Fleas are the single most common cause of skin problems in dogs and cats.
Some pets tolerate the odd bite without much trouble. Others are flea-sensitive — and for those animals a single bite is enough to inflame the skin for days. The trigger isn’t the bite itself; it’s the flea’s saliva. Sensitive pets often develop a full flea allergy that escalates into hot spots, hair loss, and persistent itching.
Reliable flea control is the first move in any new skin case. If fleas aren’t ruled out, nothing else really works.
2. Atopy (environmental allergies)
Atopy is an allergic reaction to something the pet encounters in its environment — and it’s one of the most common skin diseases in both species.
Typical triggers:
- Airborne pollens and grasses
- Dust mites
- Mould spores
- Bedding materials
- Household chemicals and cleaning products
Atopic pets often lick their paws, rub their faces, and develop reddened, itchy skin. Almost anything in the environment can be a trigger, which makes diagnosis frustrating.
3. Food allergies
Food allergies cause skin disease in both dogs and cats. The reaction is to a specific ingredient — most often:
- Beef
- Poultry
- Grains such as corn or wheat
- Preservatives and additives
Some pets are sensitive enough that they need a specialist diet long-term. An elimination diet — feeding a single novel protein and carbohydrate for several weeks before reintroducing suspects — is the standard way to pinpoint the culprit.
4. Yeast and bacterial skin infections
Yeast and bacteria are the classic secondary skin invaders. They rarely cause skin disease on their own — instead, they move in once a flea allergy, atopy, or food allergy has already inflamed and broken the skin.
The result is a very itchy pet with a smell, reddened patches, and often scaly or weeping skin. Treating the infection alone won’t fix the problem. The underlying allergy or parasite has to be addressed at the same time.
5. Mange
Mange is the general term for skin disease caused by mites. The two most common types:
- Demodectic mange is caused by the Demodex mite. It’s most commonly seen in puppies but can appear in adult dogs, and there’s a feline form too. Mange is much less common in cats than in dogs.
- Sarcoptic mange (also called scabies) is caused by Sarcoptes scabeii. It’s intensely itchy and — importantly — contagious to humans.
Other less common mange forms exist, but demodectic and sarcoptic are the ones most often diagnosed.
6. Ringworm
Ringworm isn’t as common as the others on this list — but it’s especially problematic because it’s contagious to other pets and to people, and the fungal spores are stubbornly difficult to remove from a home environment.
The name is misleading. Ringworm (also called dermatophytosis) isn’t caused by a worm at all. It’s a fungal skin disease, and several different fungi can be responsible.
What to do about it
All of these conditions can be cured or managed with the right approach. The plan is the same regardless of the trigger:
- Identify the cause — fleas, food, environment, mites, fungus.
- Prevent further damage — eliminate the trigger or reduce exposure.
- Treat the affected skin with a healing topical to clear secondary infection and rebuild the skin barrier.
The Dermagic system was designed for exactly this — gentle, natural shampoos and topical lotions that clean the skin, kill yeast, bacteria and fungal invaders without steroids, and let the skin heal.
For guidance choosing the right products for your pet, email info@dermagic.eu or call 01624 829575.