II. Causes
- Pruritic Conditions
- Third trimester of pregnancy
- Following Scabies treatment
III. Pathophysiology
- Abnormal autonomic reflex response to allergen
IV. Technique
- Stroke skin of back with blunt object (Tongue blade)
V. Interpretation
- Normal response: White line
- Faint pale line along stimulation path
- Abnormal response: Red line
- Mild: Bright red line with red mottling extension
- Exaggerated: Wheal with raised, edematous, pale skin