A 4 year-old boy is brought to the emergency department by his parents with a history of increasing numbers of red spots on his legs over the past 6 days. They took him to two different family doctors and have tried various creams. The spots have spread to his buttocks and his arms, and now his legs are sore and look swollen. He has also had abdominal pains.
On examination he looks well with age-appropriate vital signs, but he is reluctant to move his lower limbs. The image of his rash is attached herewith. What is the likely diagnosis and what is the appropriate management, disposition and follow up? *This case is by Docplexus Editorial Team for educative purpose only.
