Differential Diagnosis for Rash on Hands
- Single most likely diagnosis
- Contact Dermatitis: This is often the most common cause of a rash on the hands, resulting from exposure to allergens or irritants such as soaps, detergents, or certain metals. The rash typically appears as red, itchy, and inflamed skin.
- Other Likely diagnoses
- Eczema (Atopic Dermatitis): A chronic condition characterized by dry, itchy, and inflamed skin. It often affects the hands, especially in individuals with a history of allergies or asthma.
- Psoriasis: An autoimmune condition leading to thick, scaly, red patches on the skin, which can occur on the hands. It's associated with other systemic symptoms and a family history of the condition.
- Dyshidrotic Eczema: A type of eczema that specifically affects the hands and feet, characterized by small, itchy blisters.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Toxic Epidermal Necrolysis (TEN) or Stevens-Johnson Syndrome (SJS): Although rare, these are life-threatening conditions usually triggered by medications, leading to widespread skin necrosis and detachment. Early recognition is crucial for survival.
- Secondary Syphilis: Can cause a rash on the palms of the hands, among other symptoms. It's critical to diagnose and treat syphilis to prevent long-term complications and transmission.
- Rare diagnoses
- Pompholyx: A rare condition characterized by the appearance of small, itchy blisters on the hands, often associated with an allergic reaction or idiosyncratic response.
- Keratoderma: A group of rare genetic disorders leading to thickening of the skin on the palms and soles, which can be associated with other systemic conditions.
- Mycosis Fungoides: A rare type of cutaneous T-cell lymphoma that can initially present with skin lesions resembling eczema or dermatitis on the hands, among other areas.