Whole body was itching;he thought it was an allergy, but he was diagnosed with.

There are several potential causes for whole-body itching. Here are some common ones:

1. Allergies: While he initially thought it was an allergy, it could still be a reaction to something like food, pollen, pet dander, or a new detergent.
2. Skin Conditions: Conditions such as eczema, psoriasis, or dermatitis can lead to widespread itching.
3. Dry Skin: Especially in winter months or in dry climates, dry skin can cause significant itching.
4. Infections: Fungal infections (like ringworm) or viral infections (like chickenpox) can cause itching.
5. Systemic Conditions: Certain underlying health conditions, such as liver disease, kidney disease, or thyroid problems, can lead to itching as a symptom.
6. Medications: Some medications can cause itching as a side effect or allergic reaction.
7. Stress and Anxiety: Psychological factors can also manifest as physical symptoms, including itching.

If he’s been diagnosed with a specific condition, it would be helpful to know that for more tailored information. Otherwise, consulting a healthcare professional is the best way to determine the exact cause and appropriate treatment.