Don't delay. Although you ain't in contact with the source, actually, the scar tissue still saves the heat. The longer it's delayed, the longer the process of tissue destruction is in progress.
If it's possible, place the wound in the water flow. If it ain't available, at least, soak in water until the pangs are lost. Don't use ice water. The use of ice directly on the burn may lead to frostbite due to too low changes in temperature.
While waiting for medical help, to relieve pain, you can take painkillers, such as paracetamol.
However wound condition is, still hold the rule of medicine: do no harm. Don't add to the danger. Most importantly, keep the wound from dirt, flies, and all causing infection.
In blistered burns, don't ever slough the parts. If it's available, cover the wound loosely with sterile gauze. During the treatment period, the wound cover must frequently be replaced to avoid infection.
In serious burns, you can go into shock. This happens because most of the volume of fluid is delivered to the wound area, so the blood to the brain and heart plummets. Not to mention the pain and fear are.
Therefore, in addition to aid on the wound, you also have to be calm. Shock risk needs to aware if extensive wounds are more than 20 percent of body surface area.
To prevent shock, lay with the head lower than the rest of the body. If you're conscious and can swallow, drink a lot and immediately go to the hospital. The first aid instructions only work to rescue you from further harm.
The further aid remains in the hands of a doctor.
You may also like:
The Feeling Good Handbook
When Panic Attacks
Ten Days to Self-esteem
The Burn Journals