My son developed bumps all over his body followed by
Oral antihistamine and topical soothing lotion
Hello and welcome to ask a doctor service. I have reviewed your query and here is my advice.
Please upload a photo of his lesions.
Perhaps he has Urticaria or Hives. I suggest him to continue with calamine lotion. In addition I suggest him to take an oral antihistamine e.g cetrizine 10mg tablet once a day for symptomatic relief.
Hope I have answered your query. Let me know if you need any more assistance.