Differential Diagnosis for Skin Rash
- Single Most Likely Diagnosis
- Atopic Dermatitis (Eczema): This is a common condition characterized by itchy, inflamed skin. It's often seen in individuals with a history of allergies or asthma, and its prevalence makes it a likely diagnosis for a skin rash.
- Other Likely Diagnoses
- Contact Dermatitis: An allergic or irritant reaction to substances like soaps, detergents, or metals, leading to a skin rash. This is common and can occur in anyone.
- Psoriasis: An autoimmune condition causing red, scaly patches on the skin. It's relatively common and can be triggered by various factors, including stress and certain medications.
- Seborrheic Dermatitis: A condition causing scaly patches, red skin, and stubborn dandruff, often affecting oily areas of the body. It's common and can be linked to stress, cold weather, and other factors.
- Do Not Miss Diagnoses
- Meningococcemia: A severe infection that can cause a rash, often accompanied by fever, headache, and stiff neck. It's life-threatening and requires immediate medical attention.
- Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis: A severe skin condition usually caused by an adverse reaction to medication, leading to blistering and peeling of the skin. It's rare but potentially fatal.
- Lyme Disease: A bacterial infection from a tick bite, which can cause a distinctive "bull's-eye" rash, along with fever, headache, and fatigue. If untreated, it can lead to serious complications.
- Rare Diagnoses
- Pemphigus: A group of autoimmune diseases causing blistering of the skin and mucous membranes. It's rare and can be life-threatening if not treated.
- Kawasaki Disease: A condition mainly affecting children, causing fever, rash, and swelling, with potential for serious cardiac complications if not treated promptly.
- Erythema Multiforme: An immune-mediated disorder causing skin lesions, often in response to infections or medications. It's rare and can range from mild to severe.