Since the lesions are raised,itchy and recurring it could be Acute urticaria
.I will put him on systemic steroids,Omnacortil
syrup 5ml twice daily for a week along with Syrup Atarax5mg twice daily with topical calamine
lotion as and when required for one week and report to me later with blood results of Totaland differential count,Absolute Eosinophil count
and ESR level.