Question category: Nephrology
A 6 year old boy presents with a palpable purpuric rash on his buttocks and lower limbs. He is also complaining of some mild joint pain in the knees and ankles. There is evidence of proteinuria on urinalysis. He is otherwise very well and his bloods are normal with no evidence of renal impairment, although he is complaining of mild joint discomfort. He is diagnosed with Henoch Schonlein purpura. Which of the following should be utilised initially in the management?