Intertrigo is a skin condition that occurs in areas where the skin folds or rubs against each other, leading to redness, inflammation, and itching. Some synonyms for intertrigo include skin fold dermatitis, intertriginous dermatitis, and inverse psoriasis. Skin fold dermatitis refers to the redness and inflammation that occurs in the skin folds, while intertriginous dermatitis is a general term for skin irritation resulting from skin-to-skin contact. Inverse psoriasis is a chronic skin condition that affects the folds of skin, particularly in the groin, armpits, and under the breasts. It presents with red, shiny, and smooth patches that can be itchy and uncomfortable.