I have been experiencing what appears to be large bumps
Hello and welcome to ask a doctor service. I have reviewed your query and here is my advice.
Perhaps you have Hives. I suggest you to take an oral antihistamine e.g cetrizine 10mg tablet once a day for a few days. Topically you may use a soothing lotion e.g calamine lotion to calm down the rashes.
Hope I have answered your query. Let me know if you need any more assistance.