014. Skin Problems
Description
This article is from the rec.pets.dogs: Health Care Issues FAQ, posted to rec.pets.dogs newsgroup. Maintained by Cindy Tittle Moore with numerous contributions by others.
014. Skin Problems
Remember that a dog's skin is composed of only one layer, so it is much more delicate than a human's skin, which has three layers. A dog's skin depends on the hair and oils on it to keep it in good condition.
Some preventive steps:
* Keep your dog properly fed to prevent dry skin
* When bathing your dog, use dog-formulated shampoo to prevent dry skin
* Groom your dog regularly; some problems are caused by matted hair providing breeding grounds for a variety of skin diseases, regular grooming also helps keep you aware of any incipient problems
* Keep your dog flea and parasite free
* Check your dog regularly for foxtails, burrs, and other sharp objects it may pick up when outside
Relieving dry skin
Some things to try:
* Shampoos with lanolin
* A good soak in cool water
* Non-drying shampoo: eg, Hy-Lyt EFA is non-allergenic
* Medicated shampoos may help with allergy-induced problems
* Avon's Skin-So-Soft(tm) added to the rinse water
Allergies followed by staph infections
Once a dog has an allergic reaction, it is quite common to have a secondary staph infection. Many vets aren't familiar with this. The staph infection may stay around long after the allergy is gone.
A vet that specializes in dermatology can be of great help in dealing with skin problems. See if your vet can refer you to such a person.
Some studies on primrose and fish oil in helping relieve or cure secondary infections from allergies are documented in DM, March 1992. More information may also be obtained from writing to the RVC Dermatology Dept, Royal College St, London. NW1.
Summary table
It is beyond the scope of this FAQ to examine any of these skin problems in great detail, but here is a summary table of possible problems. Summarized from the summary tables in Carlson & Giffin, pages 67-69.
Itchy Skin Disorders
Name Symptoms ----------------------------------------------------------------------------- Scabies | *intense* itching, small red spots, typical crusty ear tips ------------+---------------------------------------------------------------- Walking | puppies 2-12wks, dry flakes move from head to neck to back, Dandruff | mild itchiness ------------+---------------------------------------------------------------- Fleas | itching/scratching on back, tail, hindquarters ------------+---------------------------------------------------------------- Lice | on poorly kept/matted coat dogs, uncommon, may have bald spots ------------+---------------------------------------------------------------- Ticks | irritation at site of bite, often beneath ear flaps or thin skin ------------+---------------------------------------------------------------- Damp Hay | severe itch from worm larvae, contacted from damp marsh hay Itch | (regional) ------------+---------------------------------------------------------------- Inhalation | severe itch, face rubbing, licking paws, seasonal Allergy | also regional ------------+---------------------------------------------------------------- Flea Allergy| scratching continues after fleas killed, pimple rash Dermatitis | ------------+---------------------------------------------------------------- Contact | itching/irritation at site of contact Dermatitis | ------------+---------------------------------------------------------------- Allergic | repeated or continuous contact (eg flea collar), Contact Derm. rash may spread ------------+---------------------------------------------------------------- Lick sores | "boredom sores", licking starts at wrists/ankles
Hormone-related Hair Loss or Poor Hair Growth
Name Symptoms ----------------------------------------------------------------------------- Thyroid | loss of hair Deficiency | (see Canine Ailments) ------------+---------------------------------------------------------------- Cortisone | hair loss in symmetrical pattern, esp. trunk, skin is thin Excess | may also be from steroid treatments ------------+---------------------------------------------------------------- Estrogen | greasy hair, hair loss in flanks/abdomen, wax in ears, loss of excess | hair around genitals, enlargened nipples, dry skin, brittle hair ------------+---------------------------------------------------------------- Estrogen | scanty hair growth, smooth soft skin deficiency | ------------+---------------------------------------------------------------- Acanthosis | hair loss in armpit folds, black thick greasy rancid skin Nigrans | ------------+---------------------------------------------------------------- Seborrhea | "dandruff", hair/skin oily, yellow brown scales on skin, | resembles ringworm
Other Hair Loss, etc
Name Symptoms ----------------------------------------------------------------------------- Collie Nose | sunburn on lightly pigmented nose, loss of hair next to nose ------------+---------------------------------------------------------------- Ringworm | scaly/crusty/red circular patches .5-2in diameter w/hair loss | in center and red margin at edge (not from a worm) ------------+---------------------------------------------------------------- Demodectic | hair loss around eyelids, mouth, front leg, young dogs mange #1 | ------------+---------------------------------------------------------------- Demodectic | progression of #1, patches enlarge & coalesce, pyoderma mange #2 | complications, affects all ages ------------+---------------------------------------------------------------- Calluses, | gray/hairless/wrinkled skin over elbow, pressure points elbow sores |
With Pus Drainage (Pyoderma)
Name Symptoms ----------------------------------------------------------------------------- Puppy | impetigo: pus filled blisters, crusty hairless skin Dermatitis | on abdomen, groin; acne: purple-red bumps on chin, lower lip ------------+---------------------------------------------------------------- Hair pore | pimple-like bumps on back, sometimes draining sinus, infection | hair loss ------------+---------------------------------------------------------------- Skin Wrinkle| inflamed skin, foul odor in lip fold, facial fold, Infection | vulvar fold, tail fold ------------+---------------------------------------------------------------- Hot Spots | in heavy coated dogs, painful inflamed patches of skin with | a wet, pus covered surface from which hair is lost ------------+---------------------------------------------------------------- Cellulitis | painful hot inflamed skin (wound infections, foreign bodies, | breaks in skin) ------------+---------------------------------------------------------------- Abscesses | pockets of pus beneath the skin, swells, comes to a head & drains ------------+---------------------------------------------------------------- Puppy | under 4mos, sudden painful swelling of lips, eyelids, Strangles | ears and face, draining sores, crusts, and sinus tracts | (prompt vet attention required, do not pop "acne")
Lumps or Bumps on/beneath Skin
(all lumps should be checked by vet even if not apparently painful)
Name Symptoms ----------------------------------------------------------------------------- Papillomas, | anywhere, including mouth, not painful Warts | can look like chewing gum stuck to skin ------------+---------------------------------------------------------------- Hematomas | (bruises) - esp. on ears, from trauma ------------+---------------------------------------------------------------- Tender Knots| esp. at site of shot or vaccination, painful ------------+---------------------------------------------------------------- Cysts | smooth lumps beneath skin, slow growth, possible cheesy | discharge, possible infection, otherwise not painful ------------+---------------------------------------------------------------- Possibly | rapid growth, hard & fixed to surrounding tissue, cancerous | any lump from a bone, starts to bleed, a mole that spreads or lump | ulcerates, open sores that do not heal (only way to tell for | sure is a biopsy)
Diagnosing
Skin problems are not easy to diagnose and cure, but there is a lot of research going on. Something that can help is to keep a diary for the dog. Every day, record what the dog ate, what the weather was like, whether it is itching or not, and anything else that might be relevant (visitors, for instance, when it is bathed, and so forth). It's sometimes hard to recall all the variables that might be affecting the dog, but if you keep a diary, sometimes patterns become very clear.
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