A young boy had itchy, excoriated papules on the forehead and the exposed pas of the arms and legs for three years. The disease was most severe in the rainy season improved completely in winter. The most likely diagnosis is

Ans. a. Insect bite hypersensitivity A young boy had itchy, excoriated papules on the forehead and the exposed pas of the arms and legs for three years. The disease was most severe in the rainy season improved completely in winter. The most likely diagnosis is insect bite hypersensitivity. Insect Bite Hypersensitivity: Predominance of lesions on exposed pa of body indicate the role of an external gent in the causation rather than an endogenous agent Increased incidence in rainy season as insect bites are more common in rainy season due to increased breeding