Differential Diagnosis for Red and Raised Rash in the Bends of Skin
- Single Most Likely Diagnosis
- Atopic Dermatitis (Eczema): This condition is characterized by red, raised, and itchy patches on the skin, often appearing in the bends of the elbows, behind the knees, and on the face. It's a common condition, especially in children, and its appearance in skin folds makes it a likely candidate for the described symptoms.
- Other Likely Diagnoses
- Contact Dermatitis: This is a type of skin inflammation caused by contact with irritants or allergens. It can appear as red, raised patches and can occur in any area of the skin, including the bends, depending on the exposure.
- Seborrheic Dermatitis: Although it more commonly affects the scalp, face, and torso, seborrheic dermatitis can sometimes appear in skin folds, presenting with red, oily, and flaky patches.
- Psoriasis: While it typically affects the elbows, knees, and scalp, psoriasis can appear in skin folds (intertriginous psoriasis), presenting as smooth, red patches without the typical scale seen in other forms of psoriasis.
- Do Not Miss Diagnoses
- Cellulitis: A bacterial infection of the skin and subcutaneous tissues, cellulitis can present as red, warm, and tender skin and can occur anywhere, including the bends of the skin. It requires prompt antibiotic treatment.
- Erythema Infectiosum (Fifth Disease): Caused by parvovirus B19, this condition can start with a "slapped-cheek" appearance but can also present with a reticular rash on the body, including the skin folds, although it's more common in children.
- Rare Diagnoses
- Granuloma Gluteale Infantum: A rare condition seen in diaper-wearing infants, characterized by reddish-brown nodules in the groin and gluteal folds.
- Intertrigo: A condition caused by friction and moisture in skin folds, leading to redness and sometimes secondary infections. While not rare, its inclusion here is due to its specific requirement for skin fold involvement and potential for being overlooked in favor of more common dermatoses.
- Lichen Simplex Chronicus: A condition characterized by thickened skin due to chronic scratching or rubbing, which can occur in any area, including skin folds, but is less common in these areas compared to other diagnoses listed.