Parasites are behind a huge share of dog skin problems — fleas, ticks, chiggers and microscopic mange mites. Here’s how to recognise each one and why steroids are the wrong response.
What counts as a parasite
A parasite is an organism that lives in or on the tissue of a host and causes harm without immediately killing it. Some are relatively innocuous, some are downright nasty, and some cause the worst skin problems you’ll ever see on a dog.
The list that matters for skin: fleas, ticks, chiggers, deer flies, gnats — and then the microscopic mites that cause mange.
Fleas, ticks, chiggers and gnats
When a dog suddenly starts scratching and biting at itself, the first thought is almost always fleas. Often correctly. A single flea bite is enough to inflame the skin of a flea-sensitive dog for several days, and repeated exposure builds a hypersensitivity that turns into full flea allergy dermatitis, hot spots, and worse.
Chiggers, deer flies and gnats (sometimes called No-See-Ums) are mostly nuisances. They don’t tend to create systemic skin problems, though they make a dog miserable in the moment.
Tick bites rarely trigger an allergic reaction, but they can leave a slow-healing lesion behind — and that lesion is an open door to secondary infection.
Mighty mites and mange
Mites are microscopic creatures that resemble tiny spiders. Three groups matter for dogs:
Sarcoptic mange mites (scabies)
These are the nasty ones. Sarcoptic mites burrow under the skin, causing intense itching, reddened skin, thinning hair (alopecia) and the development of crusts and scabs. Bacterial infection follows almost as a matter of course.
Sarcoptic mange is highly contagious and frequently misdiagnosed as allergic dermatitis — even by experienced vets. The mites burrow so deep that skin scrapings usually come back negative. They prefer skin with little hair, so they show up first on the ears, elbows, abdomen and hocks. As the infestation spreads, hair is lost and the mites colonise larger areas.
Many dogs are treated with cortisone or prednisone for “allergic dermatitis” when Sarcoptic mites are the real culprit. The unnecessary steroid suppresses the immune response, the mites spread, and the dog ends up substantially worse off than before.
Demodectic (Demodex) mites
Demodex mites live in the hair follicles of normal dogs in small numbers. Most dogs carry a few and never notice. Under stress, illness, or immune suppression, the population explodes and demodicosis sets in.
The good news: Demodex mites are usually visible on a skin scraping under a microscope, so diagnosis is straightforward. The less good news: generalised demodicosis is serious and often hard to treat. Large areas of the body may be affected, the skin becomes red, crusty and warm, pustules develop, and the area takes on a strong rancid odour.
Cheyletiella mites
The famous “walking dandruff.” Under a magnifying glass they look like tiny spiders, and what appears to be ordinary dandruff turns out to be the mites themselves moving across the skin’s surface. Less destructive than the other two — but still needs proper treatment.
The cortisone trap
The single worst response to any of these parasitic problems is a cortisone shot. Steroids suppress the immune system, which means the parasite and any secondary infection get free rein. A Sarcoptic case treated as an allergy with prednisone gets dramatically worse, not better.
How Dermagic helps
Dermagic products stop the bacterial, yeast and fungal infections that move into parasite-damaged skin, and the active ingredients are toxic to certain parasites topically. The lotion penetrates into the follicles where Demodex and similar mites live. The salve treats the open lesions left by ticks and flea bites before they turn into hot spots.
The principle is the opposite of steroids: support the skin and immune system, kill the pathogens at the surface, and let the dog’s own defences rebuild healthy skin from underneath.
For specific guidance email info@dermagic.eu or call 01624 829575.