Differential Diagnosis
The patient's symptoms of emanations from all over the body can be approached by considering various diagnoses across different categories. Here's a structured differential diagnosis:
Single Most Likely Diagnosis
- Severe Itching or Pruritus: This could be due to a variety of causes such as allergic reactions, skin conditions (like eczema or psoriasis), or systemic diseases (like liver or kidney disease). The description of emanations from all over the body might imply a widespread skin reaction or sensation.
Other Likely Diagnoses
- Urticaria (Hives): Characterized by itchy, raised welts that can appear anywhere on the body, often due to allergic reactions.
- Eczema (Atopic Dermatitis): A condition that makes your skin red and itchy, and can appear all over the body.
- Insect Bites or Stings: Multiple bites or stings from insects like mosquitoes, bed bugs, or fleas can cause widespread itching and skin reactions.
Do Not Miss Diagnoses
- Anaphylaxis: A severe, life-threatening allergic reaction that can cause widespread skin symptoms, including hives and itching, along with other systemic symptoms like difficulty breathing and a drop in blood pressure.
- Toxic Epidermal Necrolysis (TEN) or Stevens-Johnson Syndrome (SJS): Rare but life-threatening skin conditions usually triggered by medications, leading to widespread skin necrosis and detachment.
Rare Diagnoses
- Cutaneous T-Cell Lymphoma: A type of skin cancer that can cause skin lesions and itching.
- Mastocytosis: A condition characterized by an accumulation of mast cells in one or more organs, which can lead to widespread itching and skin lesions.
- Delusional Parasitosis: A psychiatric condition where the patient has a fixed, false belief that they are infested with parasites, leading to complaints of sensations or emanations from the skin.
Each of these diagnoses requires careful consideration of the patient's full clinical presentation, including history, physical examination, and potentially, diagnostic tests to determine the underlying cause of the symptoms.