Skin Fold Dermatitis

Skin fold dermatitis describes inflammation that develops in areas where skin folds back on itself, creating a warm, moist environment that can support bacterial or yeast overgrowth. It most often occurs in deep facial folds, lip folds, tail folds, vulvar folds, or between the toes in certain breeds. The overlapping skin traps moisture, oils, and debris, which can lead to irritation, odour, and infection. Owners often notice redness, dampness, or a distinctive smell in the affected folds, and may see their dog or cat rubbing or scratching at the area. Some folds show only mild discolouration, while others develop crusting, discharge, or hair loss. The problem can be intermittent or persistent, and tends to recur if the underlying anatomy and moisture are not managed. This page explores the patterns that may appear, what is happening in the skin and fold environment, how the condition is confirmed and monitored, and the range of approaches—from routine care to surgical correction—that may be considered depending on the severity and location.