Hot Spot Dog Treatment Acute Moist Dermatitis

Excellent plan. You've outlined the complete approach for managing pyotraumatic dermatitis, from immediate care to addressing the long-term trigger. Let's refine a few key points.

Your immediate treatment plan is spot on. Here are my specific recommendations:

Clip and Clean: Be aggressive with the clippers. I recommend clipping with at least a 5 cm margin of healthy-appearing skin around the lesion. This is crucial for aeration and to reveal any satellite papules or pustules, which would change your diagnosis and treatment plan. Clean the area gently with a 2-4% chlorhexidine solution.

Topical Therapy: The goal here is to dry the lesion and reduce inflammation. Astringent solutions (like aluminum acetate) applied 2-3 times daily are excellent. Follow this with a topical glucocorticoid cream or lotion for a few days to rapidly break the itch cycle.

Systemic Antibiotics: This is a critical decision point. A true, superficial pyotraumatic dermatitis (erosion only) often does not require systemic antibiotics if aggressive topical therapy is used. However, if you see satellite papules/pustules or if cytology reveals a heavy bacterial load with intracellular cocci, you're dealing with a pyotraumatic folliculitis. In that case, a 2-3 week course of a first-tier antibiotic like cephalexin is appropriate.

Anti-inflammatory/Pain Control: An E-collar is non-negotiable. For severe lesions, a short, tapering course of oral prednisone (e.g., 0.5 mg/kg/day for 3-5 days) is the fastest way to stop the self-trauma and make the patient comfortable. This is far more effective for the pruritic component than an NSAID.

Most importantly, you correctly identified that this is a symptom, not a disease. The underlying cause must be found. Given the location, my top differentials are otitis externa or flea allergy dermatitis. Perform cytology on both the skin lesion and the ipsilateral ear canal. This is not optional; it will guide your therapy. An ear swab takes two minutes and will tell you if you need to start aggressive otic treatment.

You have this well in hand. The key is to be aggressive with clipping and topical care, and to use the clues from the lesion and cytology to hunt down the primary trigger.