Canine Legislature Pamela A. Dermatologic Skin Disorders of the Dog: Secondary Skin Conditions Resulting from Allergies. Pyotraumatic Dermatitis aka "Hot Spots". Hot spots occur as single, intensely pruitic itchy lesions resulting from self-inflicted trauma to the skin, food allergies and skin disorders. These lesions can appear within minutes and predominantly occur when allergic food allergies and skin disorders within headaches and blood pressure skin cause a sensation of itchiness or pain.
The dog attempts to alleviate the symptom by licking, chewing, or scratching which leads to trauma and further inflammation to the skin. Labrador retrievers, Golden retrievers, St.
Bernards, Collies, and German Shepherds show an increased breed predisposition for developing hot spots most likely because these breeds have a higher incidence for allergic reactions which are the number one underlying cause for hot spots. The most common causes for hot spot development in the dog are allergic conditions associated with: Yeast infections, drug reactions, and autoimmune disorders are less commonly the cause of hot spots.
Pyotraumatic Dermatitis "Hot Spots". A role for Staphylococcus infection has been implicated in the development of hot spots. Staphylococcus infection as a cause for hot spots, however, remains controversial since Staphylococcus may inhabit the skin of many normal dogs without producing hot spots.
Despite this, dogs with allergies have been found to have an increased number of Staphyloccus inhabiting the skin which suggests that allergies may predispose to both hot spot formation and Staphylococcus infections. Hot spots appear most commonly on the rump, near the rectum, food allergies and skin disorders, or on the face just below the ears.
They present as intensely reddened, often round patches of moist, sometimes ulcerated areas of skin. The fur over these areas is often matted and coated with a serous discharge, which will eventually crust-over. Intense itching can result in large lesions within a matter of minutes. The lesions are painful and often swollen, and continued self-trauma of licking and chewing may result in thickened skin and scarring.
Diagnosis of hot spots is easily made by observation of the lesions. The diagnosis of the primary cause for development of a hot spot, however, is frequently made through an elimination process. Skin scrapings are first performed to rule out the presence of parasitic infection such as Demodex, and the dog is usually examined for evidence of "flea dirt" dried food allergies and skin disorders excreted by fleaswhich would indicate flea infestation.
For dogs with recurrent hot spots, additional laboratory work-up is often required. In such cases, cultures to identify bacteria or fungal infections are obtained, and in some instances a skin biopsy may be helpful for identifying some of the less common primary causes for hot spot development.
If allergy is suspected, allergy testing or an elimination diet may be utilized, food allergies and skin disorders. Finally, if all other approaches fail to identify a primary cause, laboratory testing for specific immune or metabolic disorders is often performed. In many cases, sedation or a topical anesthetic is required to perform this task because of the sensitivity and pain associated with the lesion.
Once food allergies and skin disorders hair is removed, the lesion is gently washed with an antimicrobial shampoo containing either benzoyl peroxide or benzalkonium chloride. Care should be taken to ensure that all residual soap is removed and the lesion should be gently patted dry. Many dogs need to wear a protective device, such as an Elizabethan collar, to prevent incessant chewing, licking or scratching that will produce further trauma to the effected area and delay healing.
The following table provides a list of commonly metformin and sluders neuralgia products for the follow-up treatment of hot spots: Anti-itch agents methol 0. Dogs that recover from hot spots frequently go on to develop recurring lesions related to the primary underlying cause i. Therefore, identification and elimination of the factors that contribute to hot spot formation are essential for controlling the development of these lesions.
Humidity often seasonally coincides with primary conditions that bring on hotspots: Additionally, food allergies and skin disorders, frequent food allergies and skin disorders can lead to ear infections that may increase risk for hot spots.
When fleas or other biting insects are the primary cause of hot spots, systemic or topical flea preventatives or flying-insect repellants i. If ear infections are the problem, cleaning the ears several times per week with a veterinary product such as Oti-clens or similar productespecially following a swim, may help reduce incidence of ear infections and associated hot spot development. Additionally, following a swim, remove wet collars and dry the fur as completely as possible since moist fur in humid weather can lead to itchy skin and thus hotspots.
Pollen can exacerbate skin allergies and lead to hotspots because of incessant chewing and scratching. Keeping the dog indoors during times of the day when pollen count peaks early morning and early evening helps reduce exposure to pollen.
Causes of Hot Spots. Use within first hours; quickly dries out the lesion. Substitute cold or heat sensation for itchy sensation. Short-acting itch and pain relief. Anecdotal reports of symptom relief.
Safe and most effective topical treatment; systemic use should be limited only to short-term treatment since long-term use will cause immunosuppression and increase risk for dermal infections. Combination glucocorticoids and antibiotics. Produce best control of symptoms and fastest healing; recommended for short-term use only. Antibiotics against Staphylococcus intermedius, food allergies and skin disorders. Cephalexin; Primor; Clavamox; Baytril.
Administered for 14 days then 7 to 10 days beyond clincal cure to control recurrent infection.