why does my dog have a red rash

If your dog suddenly gets a rash or an allergic reaction despite having no history of sensitivity, then it may be contact dermatitis. Symptoms usually develop after a period of repeated physical contact and skin sensitization, and contact dermatitis occurs most often on the stomach, the scrotum, and/or the legs (or in other places where there is thin hair or no hair). Aside from poison ivy and poison oak, your dog could develop a rash by coming into contact with topical antibiotics, flea collars, flea medication, metals like nickel, grasses and pollens, soaps/shampoos, carpet deodorizers, insecticides, dyes, materials such as rubber, wool, leather, and plastic, poison ivy sap, road salt (melting salt), detergents, solvents, acids and alkalis, and petroleum byproducts.


Dyes and perfumes are also common irritants. If your dog has a contact allergy caused by detergent, for example, his rash will appear on the belly where his blanket or bedding has been touching it or where he has been laying on a rug or carpet. Switching to non-perfumed, sensitive-skin detergents and cleansers may give your dog relief. How to Check If your dog has been outside or in the woods, the rash may be from a plant irritant. Check your own laundry room and cleaning supplies. Did you switch to a new carpet cleanser? Is the laundry detergent that you use full of perfumes? Shampoos can also cause contact allergies. If you suspect that your dog's shampoo or grooming rituals are causing the issues, youБll need to switch products.


Ask your groomer to use a sensitive skin shampoo and to hold off on the perfumed powder and products. If you groom your dog at home, try an unscented pet shampoo or one that is medicated. Medicated shampoos often provide itch relief right away for your pet as you work to get the other factors under control. The only way to treat contact dermatitis is to avoid exposure to the irritant, whatever it may be. To get rid of the skin irritation, your veterinarian can prescribe an antihistamine. It's important that you keep your dog from licking the irritated area because it could lead to bacterial and yeast infections, which could further aggravate the skin and exacerbate the problem.
Mange is usually treated with dips and medicated shampoo.


Fleas and ticks are treated with a topical product and followed by regular application moving forward, of a parasite preventative medication. If your dog was diagnosed with parasites, the home and yard may need to be professionally fumigated. Your dog s bedding and toys should be washed in hot water. Dogs diagnosed with food allergies may need to have a dietary elimination trial. An elimination diet, under the guidance of your veterinarian, can help determine what foods your dog is allergic to. Once a food sensitivity is identified, the rash caused by the reaction should begin to clear. Ointments to soothe the skin can be prescribed.


The veterinarian may recommend you take your dog to a veterinary allergy specialist. The allergist may recommend blood allergy testing and intradermal allergy testing to narrow down the environmental allergens. In some cases, daily allergy shots can eliminate the reaction. Heat rashes may be treated with calamine lotion or hydrocortisone cream. Dogs with hot spots may be prescribed antibiotics and a short course of corticosteroids. The hair around hot spots must be clipped away and topical medications will be prescribed. Dogs with skin rashes may be prescribed anti-inflammatory medications. If the dog has a bacterial infection, antibiotics will be prescribed. The veterinarian could suggest Benadryl to help stop the itching.

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