ok i've done this before many times, just applied ice to the area, then got myself up the hosp for a check up asap
The next step is to stop the burning process. Any clothing that is not stuck to the burn should be carefully removed. The affected body surface areas should then be flooded with cold water until medical help, if necessary, is available.
The skin usually swells after a burn so it is important to remove anything constricting such as jewellery.
Do not attempt to burst any blisters that form on burnt skin
copied from
http://hcd2.bupa.co.uk/fact_sheets/html/burns. html