Differential Diagnosis for a 48-year-old with Itching Burning Rash on Torso in a Line
- Single most likely diagnosis
- Contact dermatitis: This is the most likely diagnosis due to the linear distribution of the rash, which suggests exposure to an allergen or irritant. The itching and burning sensations are also consistent with contact dermatitis.
- Other Likely diagnoses
- Phytophotodermatitis: This condition occurs when the skin reacts to certain plant chemicals and sunlight, resulting in a linear or streaked rash. It's a possible diagnosis given the linear pattern of the rash.
- Insect bites or stings: A line of bites or stings from an insect like a mosquito, bed bug, or flea could cause an itching and burning rash.
- Lichen striatus: This is a rare skin condition characterized by a linear inflammatory rash, often accompanied by itching and burning sensations.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Herpes zoster (shingles): Although less likely, shingles can present as a linear rash and is important to consider due to the potential for serious complications, such as postherpetic neuralgia or dissemination in immunocompromised individuals.
- Rare diagnoses
- Linear IgA bullous dermatosis: This is a rare autoimmune skin disorder characterized by the formation of blisters in a linear pattern, which could be accompanied by itching and burning sensations.
- Sjögren's syndrome: This autoimmune disorder can cause skin rashes, including linear ones, although it's less common and typically accompanied by other systemic symptoms.
- Erythema multiforme: A skin condition characterized by target-like lesions, which can sometimes appear in a linear pattern, often in response to an infection or medication.