I burnt my arm on an oven tray a week ago today. I put a hydrocolloid plaster on it. By Thursday eve it was v itchy so I thought I should let some air to it. That was a mistake, it stung like a demon and I'd run out of plasters. Got more on friday morning and put one on. Today I noticed some yellow seeping from the plaster. I took it off in case it was infected. It smelt a little (sorry) and there was a it of discharge but it doesnt anymore. Still stings though. Any advice please?