If you have minor burn, you should take one (or more) of these steps:
Water. Stop a burn from spreading by running cold water over the burn area for several minutes within seconds of being burned.
Flour. You can apply some flour and cover your burn site with adequate amount of flour. Do not rub, just apply cover the burn site.
Aloe Vera Cream:
Keep an aloe vera cream in your first aid box. Aloe vera has astringent and tissue-healing properties that can help in healing burns.
Coconut Oil and Lemon Juice
Coconut oil and lemon juice both can help treat a minor burn when it has cooled and dried. Coconut oil is rich in Vitamin E and fatty acids such as lauric acid, myristic acid and caprylic acid that offer anti-fungal, antioxidant and anti-bacterial benefits. Lemon juice has acidic properties that naturally lighten the scars.
There are some other remedies that you can try. If the burn is deep or if there's any sign of infection e.g fever, water or pus oozing out of the burn, you should immediately visit a doctor.