My 8 year old daughter has a severe plaster burn

Patient: My 8 year old daughter has a severe plaster burn on her left thigh the site has become infected and has pus filled spots around the site this started off as a little pimple that burst which was covered by a plaster that pimple has gone compleatly but the site around it has gotten so bad I’m not sure what to do . She has seen the doctors and I have taken her to a&e but no tests have been done to prove it is a “plaster burn” I just want to know it’s nothing more serious then that as she has not had a plaster on it since Sunday but it is getting worse !

Doctor: