You are having urticarial eruptions due to red grapes. You did the right thing by taking Benadryl
and applying a steroid
cream. Though most of your raised eruptions have subsided but some are persisting as hot rashes over your arms, legs and feet. To treat the same, you need to continue with Benadryl for few more days till the rashes subside. Applying a calamine
lotion would soothe the rashes and reduce burning sensation. Sometimes people are allergic to certain foods. If you never had red grapes earlier, avoid eating it altogether. Hope that answers your query. Take care.