Differential Diagnosis for Dermatitis Almost All Over the Body
Single Most Likely Diagnosis
- Atopic Dermatitis (Eczema): This is the most common type of dermatitis and can cover large areas of the body. It's characterized by itchy, inflamed skin and is often associated with allergies and asthma.
Other Likely Diagnoses
- Contact Dermatitis: This condition occurs when the skin comes into contact with an allergen or irritant, causing a reaction. It can be widespread if the individual is exposed to the allergen or irritant over a large area of their body.
- Seborrheic Dermatitis: While typically affecting the scalp, face, and torso, in severe cases, seborrheic dermatitis can spread to other areas, causing widespread dermatitis.
- Psoriasis: An autoimmune condition that speeds up the life cycle of skin cells, causing cells to build up rapidly on the surface of the skin. The extra skin cells form scales and red patches that itch or burn.
Do Not Miss Diagnoses
- Staphylococcal Scalded Skin Syndrome (SSSS): A serious condition caused by staphylococcal toxins that typically affects infants and young children, but can occur in adults with significant comorbidities. It presents with widespread skin exfoliation and can be life-threatening if not promptly treated.
- Toxic Epidermal Necrolysis (TEN) and Stevens-Johnson Syndrome (SJS): These are severe skin conditions usually triggered by medications. They can cause widespread skin necrosis and detachment, and are medical emergencies.
- Pemphigus Vulgaris: An autoimmune disease that causes blistering of the skin and mucous membranes. It can be life-threatening if not treated properly.
Rare Diagnoses
- Pityriasis Rubra Pilaris (PRP): A rare skin disorder characterized by constant inflammation and scaling (exfoliation) of the skin. It can cover large areas of the body and has several subtypes.
- Erythroderma (Exfoliative Dermatitis): A condition characterized by widespread scaling, redness, and peeling of the skin, often involving more than 90% of the body surface. It can be a manifestation of underlying conditions such as psoriasis, eczema, or lymphoma.