the most common complication of a burn (a second degree burn based on your description) would be a secondary skin infection. a burn that is now "red angry and painful" may be infected. the only way for you to be sure is to see a medical professional and be examined. a description is just too vague to make a decision like that blindly.
i spilled ramen noodles down my lower leg and foot should i see a doctor? . five days ago i spilled ramen down my leg and foot. it was super red and painful to start with then not to bad of pain and now it's really bad- 5 days later! only little blisters and oozing but really angry red and blotchy. not terribly painful to the touch in spots but others are terrible. i hate the doctor but should i go?