Itchy And Burning “Help Me”

Patient: Yesterday evening my elbow started to itch and by the time I got home I had hives on my stomach legs and chest.. I took some Benadryl went to bed, when I woke up this morning everything was fine. About an hour taking a shower the hives came back. The hives left and now my elbows are on itchy plus my right hand was burning. Can you please tell me what’s going on? FYI the last time I ate was 330pm and my elbow started around 530pm

Symptoms: Itch and burning